A teacher being a member of the Manitoba Teachers’ Society Executive or any branch thereof or any special committee or any branch thereof and being authorized by the Executive of the Society in the matter of the Society business requiring absence from school, shall have the right to be absent to attend such meetings or to act as such representative or delegate and shall be excused from school duties on not more than a total of five teaching days in any school year, provided the substitute rate is assumed by the Society. A maximum of twenty-five (25) teaching days leave for the above purpose will be provided for by the Division. Further days may be granted by the Division at 1/N (Where N is the number of days in the school year) of the teacher’s annual salary, provided that in the judgment of the Division his/her class or administrative duties are left in the hands of a qualified substitute.