111. Apportionment of costs: When the Minister issues an order pursuant to section 61 of the Act, he may, failing agreement between the municipalities in question, apportion the costs of a residual materials elimination facility according to the following criteria, minus any government subsidy:(a) initial investments: all initial investment costs, including the purchase of furnishings and property, the construction of access roads, fences, barriers and buildings, as well as engineering costs and the working capital required for the first year of operation shall be apportioned pro rata to the population served in each municipality;
(b) operating and maintenance costs: all operating and maintenance costs exclusive of amortization costs shall be apportioned according to the quantities measured during one complete month by a weigh scale installed temporarily for that purpose. The rental and installation costs of the scale are considered as operating costs for the purposes of the said apportionment.