A teacher being a member of The Manitoba Teachers’ Society Executive Committee, or of the Executive Committee of any branch thereof, or of any special committee of the Society or being appointed an official representative or delegate of the Society or of any branch thereof and being authorized by the Executive Committee of the Society to attend a meeting of the Committee of which he or she is a member or to act as a representative or delegate of the Society or of any Branch of the Society in a matter of Society business requiring absence from school shall have the right to attend such meeting or to act as such representative or delegate and shall be excused from school duties for either purpose or purposes on not more than a total of six (6) teaching days in any school year, providing that a substitute satisfactory to the Division can be secured and that the cost of providing the substitute is assumed by the Society.