4. The by-laws of the union shall, in particular, determine:(a) the minimum number of shares that a person must subscribe to become a member;
(b) the mode of payment of such shares;
(c) the rate of the cost of acquisition, where provided for, imposed on every person subscribing for shares, which may be computed on the total of the amounts subscribed;
(d) the mode of payment and the apportionment of such cost.