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There should be no difference between having enabled ichain or not for
this.

app/models/ability.rb

@@ -56,10 +56,6 @@ class Ability
         conference = registration.conference
         conference.registration_open? && registration.new_record? && !conference.registration_limit_exceeded?
       end
-
-      can [:new, :create], Event do |event|
-        event.program.cfp_open? && event.new_record?
-      end
     end
   end