When a demand is made upon the Union to supply workers on a temporary basis, in excess of the numbers normally required to meet the Union’s contracts, it shall be the prerogative of the Union to dispatch workers as prospective members. Those so dispatched shall pay an amount equal to regular monthly dues and assessments for the period they are temporarily under the jurisdiction of the Union. Should a prospective member be employed and pay dues for a minimum period of three months (and cleared probation), he/she may be inducted into full membership upon payment of the initiation fee.