diff --git a/app/models/project.rb b/app/models/project.rb
index 74d981f2..372b94d2 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -36,6 +36,10 @@ class Project < ActiveRecord::Base
   # Relations
   belongs_to :group, foreign_key: "namespace_id", conditions: "type = 'Group'"
   belongs_to :namespace
+
+  # TODO: replace owner with creator.
+  # With namespaces a project owner will be a namespace owner
+  # so this field makes sense only for global projects
   belongs_to :owner, class_name: "User"
   has_many :users,          through: :users_projects
   has_many :events,         dependent: :destroy
@@ -296,4 +300,12 @@ class Project < ActiveRecord::Base
   def namespace_owner
     namespace.try(:owner)
   end
+
+  def chief
+    if namespace
+      namespace_owner
+    else
+      owner
+    end
+  end
 end
diff --git a/spec/models/project_security_spec.rb b/spec/models/project_security_spec.rb
index 60f8d45c..92c6bce0 100644
--- a/spec/models/project_security_spec.rb
+++ b/spec/models/project_security_spec.rb
@@ -4,38 +4,109 @@ describe Project do
   describe :authorization do
     before do
       @p1 = create(:project)
+
       @u1 = create(:user)
       @u2 = create(:user)
+      @u3 = create(:user)
+      @u4 = @p1.chief
+
       @abilities = Six.new
       @abilities << Ability
     end
 
-    describe "read access" do
+    let(:guest_actions) { Ability.project_guest_rules }
+    let(:report_actions) { Ability.project_report_rules }
+    let(:dev_actions) { Ability.project_dev_rules }
+    let(:master_actions) { Ability.project_master_rules }
+    let(:admin_actions) { Ability.project_admin_rules }
+
+    describe "Non member rules" do
+      it "should deny for non-project users any actions" do
+        admin_actions.each do |action|
+          @abilities.allowed?(@u1, action, @p1).should be_false
+        end
+      end
+    end
+
+    describe "Guest Rules" do
+      before do
+        @p1.users_projects.create(project: @p1, user: @u2, project_access: UsersProject::GUEST)
+      end
+
+      it "should allow for project user any guest actions" do
+        guest_actions.each do |action|
+          @abilities.allowed?(@u2, action, @p1).should be_true
+        end
+      end
+    end
+
+    describe "Report Rules" do
       before do
         @p1.users_projects.create(project: @p1, user: @u2, project_access: UsersProject::REPORTER)
       end
 
-      it { @abilities.allowed?(@u1, :read_project, @p1).should be_false }
-      it { @abilities.allowed?(@u2, :read_project, @p1).should be_true }
+      it "should allow for project user any report actions" do
+        report_actions.each do |action|
+          @abilities.allowed?(@u2, action, @p1).should be_true
+        end
+      end
     end
 
-    describe "write access" do
+    describe "Developer Rules" do
+      before do
+        @p1.users_projects.create(project: @p1, user: @u2, project_access: UsersProject::REPORTER)
+        @p1.users_projects.create(project: @p1, user: @u3, project_access: UsersProject::DEVELOPER)
+      end
+
+      it "should deny for developer master-specific actions" do
+        [dev_actions - report_actions].each do |action|
+          @abilities.allowed?(@u2, action, @p1).should be_false
+        end
+      end
+
+      it "should allow for project user any dev actions" do
+        dev_actions.each do |action|
+          @abilities.allowed?(@u3, action, @p1).should be_true
+        end
+      end
+    end
+
+    describe "Master Rules" do
       before do
         @p1.users_projects.create(project: @p1, user: @u2, project_access: UsersProject::DEVELOPER)
+        @p1.users_projects.create(project: @p1, user: @u3, project_access: UsersProject::MASTER)
       end
 
-      it { @abilities.allowed?(@u1, :write_project, @p1).should be_false }
-      it { @abilities.allowed?(@u2, :write_project, @p1).should be_true }
+      it "should deny for developer master-specific actions" do
+        [master_actions - dev_actions].each do |action|
+          @abilities.allowed?(@u2, action, @p1).should be_false
+        end
+      end
+
+      it "should allow for project user any master actions" do
+        master_actions.each do |action|
+          @abilities.allowed?(@u3, action, @p1).should be_true
+        end
+      end
     end
 
-    describe "admin access" do
+    describe "Admin Rules" do
       before do
-        @p1.users_projects.create(project: @p1, user: @u1, project_access: UsersProject::DEVELOPER)
-        @p1.users_projects.create(project: @p1, user: @u2, project_access: UsersProject::MASTER)
+        @p1.users_projects.create(project: @p1, user: @u2, project_access: UsersProject::DEVELOPER)
+        @p1.users_projects.create(project: @p1, user: @u3, project_access: UsersProject::MASTER)
       end
 
-      it { @abilities.allowed?(@u1, :admin_project, @p1).should be_false }
-      it { @abilities.allowed?(@u2, :admin_project, @p1).should be_true }
+      it "should deny for masters admin-specific actions" do
+        [admin_actions - master_actions].each do |action|
+          @abilities.allowed?(@u2, action, @p1).should be_false
+        end
+      end
+
+      it "should allow for project owner any admin actions" do
+        admin_actions.each do |action|
+          @abilities.allowed?(@u4, action, @p1).should be_true
+        end
+      end
     end
   end
 end