A teacher being a member of The Manitoba Teachers’ Society Executive Committee or of a committee 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 is a member, or to act as a representative, or a delegate shall be excused from school duties for either purpose or both purposes for not more than a total of seven (7) teaching days in any school year, and provided that a substitute satisfactory to the Board can be secured, and that the cost of providing a substitute is assumed by the Society and shall not be a charge upon the Board concerned. Upon request, the president of the Swan Valley Teachers’ Association may be granted an additional five (5) teaching days in any school year. The maximum number of days of leaves of absence by all teachers and the president of the Swan Valley Teachers’ Association shall not exceed forty (40) days. No additional leave of absence beyond seven (7) days for a teacher, and seventeen (17) days for the president of the Swan Valley Teachers’ Association in a school year shall be taken for the purpose mentioned above, except with the consent and approval of the Board.