In the current union contracts states: All work and vacation schedules for full time and part time bargaining unit members shall be posted on the unit 45 days in advance

In the current union contracts states: All work and vacation schedules for full time and part time bargaining unit members shall be posted on the unit 45 days in advance. Any anticipated delay in meeting this posting deadline will be communicated to the union vice-president and the chief steward by the Human Resource department or the particular unit manager where the delay is anticipated. But the task of posting summer vacation schedules for unit staff was due. 1. what immediate action would a chief steward take to resolve this scheduling issue on this particular unit staff? 2. How to draft a formal grievance complaint and proposed desired remedy to this situation? 3. What can be done moving forward to ensure this issue around timeliness of vacation scheduling posting does not occur again?