diff --git a/app/contracts/work_packages/base_contract.rb b/app/contracts/work_packages/base_contract.rb
index 2291699355..61d8ade786 100644
--- a/app/contracts/work_packages/base_contract.rb
+++ b/app/contracts/work_packages/base_contract.rb
@@ -144,7 +144,7 @@ module WorkPackages
       ret
     end
 
-    def assignable_statuses
+    def assignable_statuses(include_default = false)
       # Do not allow skipping statuses without intermediately saving the work package.
       # We therefore take the original status of the work_package, while preserving all
       # other changes to it (e.g. type, assignee, etc.)
@@ -154,7 +154,11 @@ module WorkPackages
                  model.status
                end
 
-      new_statuses_allowed_from(status)
+      statuses = new_statuses_allowed_from(status)
+
+      statuses = statuses.or(Status.where_default) if include_default
+
+      statuses.order_by_position
     end
 
     def assignable_types
@@ -365,7 +369,7 @@ module WorkPackages
 
       statuses = statuses.where(is_closed: false) if model.blocked?
 
-      statuses.order_by_position
+      statuses
     end
 
     def closed_version_and_status?(status = model.status)
diff --git a/app/services/work_packages/set_attributes_service.rb b/app/services/work_packages/set_attributes_service.rb
index 5628a5785c..8037c7a36c 100644
--- a/app/services/work_packages/set_attributes_service.rb
+++ b/app/services/work_packages/set_attributes_service.rb
@@ -216,6 +216,6 @@ class WorkPackages::SetAttributesService < ::BaseServices::SetAttributes
   end
 
   def assignable_statuses
-    instantiate_contract(work_package, user).assignable_statuses.or(Status.where_default.order_by_position)
+    instantiate_contract(work_package, user).assignable_statuses(true)
   end
 end
diff --git a/modules/bcf/app/controllers/bcf/api/v2_1/project_extensions/api.rb b/modules/bcf/app/controllers/bcf/api/v2_1/project_extensions/api.rb
index f33a20811d..eaf62faba2 100644
--- a/modules/bcf/app/controllers/bcf/api/v2_1/project_extensions/api.rb
+++ b/modules/bcf/app/controllers/bcf/api/v2_1/project_extensions/api.rb
@@ -31,7 +31,6 @@
 module Bcf::API::V2_1
   module ProjectExtensions
     class API < ::API::OpenProjectAPI
-
       get :extensions do
         mapper = Definitions.new(project: @project, user: current_user)
         Representer.new(mapper)
diff --git a/modules/bcf/app/representers/bcf/api/v2_1/project_extensions/definitions.rb b/modules/bcf/app/representers/bcf/api/v2_1/project_extensions/definitions.rb
index fb514aef30..bad9fc9ce1 100644
--- a/modules/bcf/app/representers/bcf/api/v2_1/project_extensions/definitions.rb
+++ b/modules/bcf/app/representers/bcf/api/v2_1/project_extensions/definitions.rb
@@ -37,26 +37,23 @@ module Bcf::API::V2_1
       end
 
       def topic_type
-        project.types.pluck(:name)
+        contract.assignable_types.pluck(:name)
       end
 
       ##
       # We only return the default status for now
       # since that can always be set to a new issue
       def topic_status
-        Status
-          .where_default
-          .pluck(:name)
+        contract.assignable_statuses(true).pluck(:name)
       end
 
       def priority
-        OpenProject::Cache.fetch(IssuePriority.all.cache_key, 'names') do
-          IssuePriority.all.pluck(:name)
-        end
+        contract.assignable_priorities.pluck(:name)
       end
 
       def user_id_type
         if allowed?(:view_members)
+          # TODO: Move possible_assignees handling into wp base contract
           project.possible_assignees.pluck(:mail)
         else
           []
@@ -101,10 +98,16 @@ module Bcf::API::V2_1
 
       attr_reader :project, :user
 
+      def contract
+        @contract ||= begin
+          work_package = WorkPackage.new project: project
+          WorkPackages::CreateContract.new(work_package, user)
+        end
+      end
+
       def allowed?(permission)
         user.allowed_to?(permission, project)
       end
     end
   end
 end
-
diff --git a/modules/bcf/app/representers/bcf/api/v2_1/topics/authorization_representer.rb b/modules/bcf/app/representers/bcf/api/v2_1/topics/authorization_representer.rb
new file mode 100644
index 0000000000..b153250802
--- /dev/null
+++ b/modules/bcf/app/representers/bcf/api/v2_1/topics/authorization_representer.rb
@@ -0,0 +1,55 @@
+#-- encoding: UTF-8
+
+#-- copyright
+# OpenProject is a project management system.
+# Copyright (C) 2012-2018 the OpenProject Foundation (OPF)
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2017 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See docs/COPYRIGHT.rdoc for more details.
+#++
+
+module Bcf::API::V2_1
+  class Topics::AuthorizationRepresenter < BaseRepresenter
+    property :topic_actions,
+             getter: ->(decorator:, **) {
+               if decorator.manage_bcf_allowed?
+                 %w[update updateRelatedTopics updateFiles createViewpoint]
+               else
+                 []
+               end
+             }
+
+    property :topic_status,
+             getter: ->(decorator:, **) {
+               if decorator.manage_bcf_allowed?
+                 assignable_statuses.pluck(:name)
+               else
+                 []
+               end
+             }
+
+    def manage_bcf_allowed?
+      User.current.allowed_to?(:manage_bcf, represented.model.project)
+    end
+  end
+end
diff --git a/modules/bcf/app/representers/bcf/api/v2_1/topics/single_representer.rb b/modules/bcf/app/representers/bcf/api/v2_1/topics/single_representer.rb
index 5578f1fade..6cc8e73278 100644
--- a/modules/bcf/app/representers/bcf/api/v2_1/topics/single_representer.rb
+++ b/modules/bcf/app/representers/bcf/api/v2_1/topics/single_representer.rb
@@ -134,6 +134,13 @@ module Bcf::API::V2_1
     property :bim_snippet,
              skip_render: true
 
+    property :authorization,
+             getter: ->(*) {
+               contract = WorkPackages::UpdateContract.new(work_package, User.current)
+
+               Topics::AuthorizationRepresenter.new(contract)
+             }
+
     def datetime_formatter
       ::API::V3::Utilities::DateTimeFormatter
     end
diff --git a/modules/bcf/spec/representers/bcf/api/v2_1/project_extensions/definitions_spec.rb b/modules/bcf/spec/representers/bcf/api/v2_1/project_extensions/definitions_spec.rb
index aea287a06d..0b650b8224 100644
--- a/modules/bcf/spec/representers/bcf/api/v2_1/project_extensions/definitions_spec.rb
+++ b/modules/bcf/spec/representers/bcf/api/v2_1/project_extensions/definitions_spec.rb
@@ -37,7 +37,7 @@ describe Bcf::API::V2_1::ProjectExtensions::Definitions, 'rendering' do
   let(:instance) { described_class.new(project: project, user: user) }
 
   describe '#topic_type' do
-    subject  { instance.topic_type }
+    subject { instance.topic_type }
 
     it 'returns the project type names' do
       expect(subject).to eq ['My BCF type']
@@ -45,9 +45,9 @@ describe Bcf::API::V2_1::ProjectExtensions::Definitions, 'rendering' do
   end
 
   describe '#topic_status' do
-    let!(:default_status) { FactoryBot.create :default_status  }
-    let!(:status) { FactoryBot.create :status  }
-    subject  { instance.topic_status }
+    let!(:default_status) { FactoryBot.create :default_status }
+    let!(:status) { FactoryBot.create :status }
+    subject { instance.topic_status }
 
     it 'returns default status only' do
       expect(subject).to eq [default_status.name]
@@ -55,8 +55,8 @@ describe Bcf::API::V2_1::ProjectExtensions::Definitions, 'rendering' do
   end
 
   describe '#priority' do
-    let!(:priority) { FactoryBot.create :default_priority  }
-    subject  { instance.priority }
+    let!(:priority) { FactoryBot.create :default_priority }
+    subject { instance.priority }
 
     it 'returns statuses for the available types' do
       expect(subject).to eq [priority.name]
@@ -69,7 +69,7 @@ describe Bcf::API::V2_1::ProjectExtensions::Definitions, 'rendering' do
                         member_in_project: project,
                         member_with_permissions: [:view_work_packages])
     end
-    subject  { instance.user_id_type }
+    subject { instance.user_id_type }
 
     before do
       allow(user)
@@ -95,7 +95,7 @@ describe Bcf::API::V2_1::ProjectExtensions::Definitions, 'rendering' do
   end
 
   describe '#project_actions' do
-    subject  { instance.project_actions }
+    subject { instance.project_actions }
 
     it 'includes nothing if not permitted' do
       allow(user).to receive(:allowed_to?).and_return false
@@ -118,7 +118,7 @@ describe Bcf::API::V2_1::ProjectExtensions::Definitions, 'rendering' do
   end
 
   describe '#topic_actions' do
-    subject  { instance.topic_actions }
+    subject { instance.topic_actions }
 
     it 'includes nothing if not permitted' do
       allow(user).to receive(:allowed_to?).and_return false
diff --git a/modules/bcf/spec/representers/bcf/api/v2_1/topics/single_representer_rendering_spec.rb b/modules/bcf/spec/representers/bcf/api/v2_1/topics/single_representer_rendering_spec.rb
index a097ac48cb..f668a9fafd 100644
--- a/modules/bcf/spec/representers/bcf/api/v2_1/topics/single_representer_rendering_spec.rb
+++ b/modules/bcf/spec/representers/bcf/api/v2_1/topics/single_representer_rendering_spec.rb
@@ -54,10 +54,36 @@ describe Bcf::API::V2_1::Topics::SingleRepresenter, 'rendering' do
         .and_return(journals)
     end
   end
+  let(:current_user) { FactoryBot.build_stubbed(:user) }
   let(:issue) { FactoryBot.build_stubbed(:bcf_issue, work_package: work_package) }
+  let(:manage_bcf_allowed) { true }
+  let(:statuses) do
+    [
+      FactoryBot.build_stubbed(:status),
+      FactoryBot.build_stubbed(:status)
+    ]
+  end
 
   let(:instance) { described_class.new(issue) }
 
+  before do
+    login_as(current_user)
+
+    allow(current_user)
+      .to receive(:allowed_to?)
+      .with(:manage_bcf, issue.project)
+      .and_return(manage_bcf_allowed)
+
+    contract = double('contract',
+                      model: issue,
+                      assignable_statuses: statuses)
+
+    allow(WorkPackages::UpdateContract)
+      .to receive(:new)
+      .with(work_package, current_user)
+      .and_return(contract)
+  end
+
   subject { instance.to_json }
 
   describe 'attributes' do
@@ -173,4 +199,36 @@ describe Bcf::API::V2_1::Topics::SingleRepresenter, 'rendering' do
       end
     end
   end
+
+  describe 'authorization' do
+    context 'if the user has manage_bcf permission' do
+      it 'lists the actions' do
+        expect(subject)
+          .to be_json_eql(%w[update updateRelatedTopics updateFiles createViewpoint].to_json)
+          .at_path('authorization/topic_actions')
+      end
+
+      it 'lists the allowed statuses' do
+        expect(subject)
+          .to be_json_eql(statuses.map(&:name).to_json)
+          .at_path('authorization/topic_status')
+      end
+    end
+
+    context 'if the user lacks manage_bcf permission' do
+      let(:manage_bcf_allowed) { false }
+
+      it 'signals lack of available actions' do
+        expect(subject)
+          .to be_json_eql([])
+          .at_path('authorization/topic_actions')
+      end
+
+      it 'lists no allowed status' do
+        expect(subject)
+          .to be_json_eql([].to_json)
+          .at_path('authorization/topic_status')
+      end
+    end
+  end
 end
diff --git a/modules/bcf/spec/requests/api/bcf/v2_1/project_extensions_api_spec.rb b/modules/bcf/spec/requests/api/bcf/v2_1/project_extensions_api_spec.rb
index 263aa9e00e..d37e13b1ef 100644
--- a/modules/bcf/spec/requests/api/bcf/v2_1/project_extensions_api_spec.rb
+++ b/modules/bcf/spec/requests/api/bcf/v2_1/project_extensions_api_spec.rb
@@ -78,11 +78,11 @@ describe 'BCF 2.1 project extensions resource', type: :request, content_type: :j
                         member_with_permissions: [:view_project, :edit_project, :manage_bcf, :view_members])
     end
 
-    let(:other_user) {
+    let(:other_user) do
       FactoryBot.create(:user,
                         member_in_project: project,
                         member_with_permissions: [:view_project])
-    }
+    end
 
     before do
       other_user
diff --git a/modules/bcf/spec/requests/api/bcf/v2_1/topics_api_spec.rb b/modules/bcf/spec/requests/api/bcf/v2_1/topics_api_spec.rb
index 68af3ac069..eb937d3db4 100644
--- a/modules/bcf/spec/requests/api/bcf/v2_1/topics_api_spec.rb
+++ b/modules/bcf/spec/requests/api/bcf/v2_1/topics_api_spec.rb
@@ -79,6 +79,19 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
                       due_date: Date.today,
                       project: project)
   end
+  let(:other_status) do
+    FactoryBot.create(:status).tap do |s|
+      member = current_user.members.detect { |m| m.project_id == work_package.project_id }
+
+      if member
+        FactoryBot.create(:workflow,
+                          old_status: work_package.status,
+                          new_status: s,
+                          type: work_package.type,
+                          role: member.roles.first)
+      end
+    end
+  end
   let(:bcf_issue) { FactoryBot.create(:bcf_issue, work_package: work_package) }
 
   subject(:response) { last_response }
@@ -90,6 +103,7 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
     before do
       login_as(current_user)
       bcf_issue
+      other_status
       get path
     end
 
@@ -114,7 +128,11 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
             "stage": bcf_issue.stage,
             "title": work_package.subject,
             "topic_status": work_package.status.name,
-            "topic_type": work_package.type.name
+            "topic_type": work_package.type.name,
+            "authorization": {
+              "topic_status": [],
+              "topic_actions": []
+            }
           }
         ]
       end
@@ -131,6 +149,41 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
 
       it_behaves_like 'bcf api not allowed response'
     end
+
+    context 'having edit permission' do
+      let(:current_user) { edit_member_user }
+
+      it_behaves_like 'bcf api successful response' do
+        let(:expected_body) do
+          [
+            {
+              "assigned_to": assignee.mail,
+              "creation_author": work_package.author.mail,
+              "creation_date": work_package.created_at.iso8601,
+              "description": work_package.description,
+              "due_date": work_package.due_date.iso8601,
+              "guid": bcf_issue.uuid,
+              "index": bcf_issue.index,
+              "labels": bcf_issue.labels,
+              "priority": work_package.priority.name,
+              "modified_author": current_user.mail,
+              "modified_date": work_package.updated_at.iso8601,
+              "reference_links": [
+                api_v3_paths.work_package(work_package.id)
+              ],
+              "stage": bcf_issue.stage,
+              "title": work_package.subject,
+              "topic_status": work_package.status.name,
+              "topic_type": work_package.type.name,
+              "authorization": {
+                "topic_status": [work_package.status.name, other_status.name],
+                "topic_actions": %w[update updateRelatedTopics updateFiles createViewpoint]
+              }
+            }
+          ]
+        end
+      end
+    end
   end
 
   describe 'GET /api/bcf/2.1/projects/:project_id/topics/:uuid' do
@@ -140,6 +193,7 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
     before do
       login_as(current_user)
       bcf_issue
+      other_status
       get path
     end
 
@@ -163,7 +217,11 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
           "stage": bcf_issue.stage,
           "title": work_package.subject,
           "topic_status": work_package.status.name,
-          "topic_type": work_package.type.name
+          "topic_type": work_package.type.name,
+          "authorization": {
+            "topic_status": [],
+            "topic_actions": []
+          }
         }
       end
     end
@@ -185,6 +243,39 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
 
       it_behaves_like 'bcf api not allowed response'
     end
+
+    context 'having edit permission' do
+      let(:current_user) { edit_member_user }
+
+      it_behaves_like 'bcf api successful response' do
+        let(:expected_body) do
+          {
+            "assigned_to": assignee.mail,
+            "creation_author": work_package.author.mail,
+            "creation_date": work_package.created_at.iso8601,
+            "description": work_package.description,
+            "due_date": work_package.due_date.iso8601,
+            "guid": bcf_issue.uuid,
+            "index": bcf_issue.index,
+            "labels": bcf_issue.labels,
+            "priority": work_package.priority.name,
+            "modified_author": current_user.mail,
+            "modified_date": work_package.updated_at.iso8601,
+            "reference_links": [
+              api_v3_paths.work_package(work_package.id)
+            ],
+            "stage": bcf_issue.stage,
+            "title": work_package.subject,
+            "topic_status": work_package.status.name,
+            "topic_type": work_package.type.name,
+            "authorization": {
+              "topic_status": [work_package.status.name, other_status.name],
+              "topic_actions": %w[update updateRelatedTopics updateFiles createViewpoint]
+            }
+          }
+        end
+      end
+    end
   end
 
   describe 'DELETE /api/bcf/2.1/projects/:project_id/topics/:uuid' do
@@ -393,6 +484,19 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
     let!(:default_status) do
       FactoryBot.create(:default_status)
     end
+    let(:other_status) do
+      FactoryBot.create(:status).tap do |s|
+        member = current_user.members.detect { |m| m.project_id == project.id }
+
+        if member
+          FactoryBot.create(:workflow,
+                            old_status: status,
+                            new_status: s,
+                            type: type,
+                            role: member.roles.first)
+        end
+      end
+    end
     let!(:default_type) do
       FactoryBot.create(:type, is_default: true)
     end
@@ -426,6 +530,7 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
 
     before do
       login_as(current_user)
+      other_status
       post path, params.to_json
     end
 
@@ -453,7 +558,11 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
           creation_date: work_package&.created_at&.iso8601,
           modified_author: edit_member_user.mail,
           modified_date: work_package&.updated_at&.iso8601,
-          description: description
+          description: description,
+          "authorization": {
+            "topic_status": [other_status.name, status.name],
+            "topic_actions": %w[update updateRelatedTopics updateFiles createViewpoint]
+          }
         }
       end
     end
@@ -489,7 +598,11 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
             creation_date: work_package&.created_at&.iso8601,
             modified_author: edit_member_user.mail,
             modified_date: work_package&.updated_at&.iso8601,
-            description: nil
+            description: nil,
+            "authorization": {
+              "topic_status": [default_status.name],
+              "topic_actions": %w[update updateRelatedTopics updateFiles createViewpoint]
+            }
           }
         end
       end
@@ -515,6 +628,19 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
     let(:status) do
       FactoryBot.create(:status)
     end
+    let(:other_status) do
+      FactoryBot.create(:status).tap do |s|
+        member = current_user.members.detect { |m| m.project_id == project.id }
+
+        if member
+          FactoryBot.create(:workflow,
+                            old_status: status,
+                            new_status: s,
+                            type: type,
+                            role: member.roles.first)
+        end
+      end
+    end
     let!(:default_status) do
       FactoryBot.create(:default_status)
     end
@@ -546,6 +672,7 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
 
     before do
       login_as(current_user)
+      other_status
       put path, params.to_json
     end
 
@@ -572,7 +699,11 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
           creation_date: work_package&.created_at&.iso8601,
           modified_author: edit_member_user.mail,
           modified_date: work_package&.updated_at&.iso8601,
-          description: description
+          description: description,
+          "authorization": {
+            "topic_status": [other_status.name, status.name],
+            "topic_actions": %w[update updateRelatedTopics updateFiles createViewpoint]
+          }
         }
       end
     end
@@ -607,7 +738,11 @@ describe 'BCF 2.1 topics resource', type: :request, content_type: :json, with_ma
             creation_date: work_package&.created_at&.iso8601,
             modified_author: edit_member_user.mail,
             modified_date: reloaded_work_package&.updated_at&.iso8601,
-            description: nil
+            description: nil,
+            "authorization": {
+              "topic_status": [default_status.name],
+              "topic_actions": %w[update updateRelatedTopics updateFiles createViewpoint]
+            }
           }
         end
       end