During the life of this Agreement and to the extent the laws of the State of Michigan permit, every employee, beginning with the month following (1) thirty (30) calendar days after the execution date of this Agreement or (2) thirty (30) calendar days after employment in the bargaining unit, whichever date is the later, and monthly thereafter, beginning September and ending in June, may tender to the Association either periodic and uniformly established dues, or, in the alternative, a service charge in an amount equivalent to periodic and uniformly established dues. Such membership dues can be tendered or paid to the Association either as provided in Article XXV, Check-Off of Association Dues, or by direct cash to the Association.