318.1. Section 318 does not apply to that part of any amount paid or forfeited in respect of the breach, modification or termination of an agreement for the making of a supply where that part is(1) an additional amount that is charged to a person because the consideration for the supply is not paid within a reasonable period and is such an amount referred to in section 57;
(2) an amount paid by one railway corporation to another railway corporation as or on account of a penalty for failure to return rolling stock within a stipulated time; or
(3) an amount paid as or on account of demurrage.