The contract says only the following items can be posted on the Bulletin Boards:

• Union recreational and/or social affairs;
• Union appointments;
• Union elections;
• Results of Union elections;
• Union meetings;
• Rulings or policies of the International Union or other Labor
  Organizations with which the Union is affiliated;
• Reports of Union standing committees;
• Any other material authorized by the Employer or his/her
  designee and the President of the local Union or his/her designee; and,
• Official Union publications.