An executive representative of the NHTA who is called to attend Association business, shall be excused from his/her teaching duties on condition that a minimum of two weeks prior notice is given and shall earn his/her regular teaching salary during such day(s) of his/her absence. The maximum number of days the executive body may attend on Society business, in any one school year, shall not exceed thirty (30) days in aggregate per school year. The Education Authority will submit invoices to the Manitoba Teacher's Society for the costs of a substitute teacher during the Executive Association Member's leave.