terminal charges less a rebate of a fixed amount, the agreement shall continue to operate for the period fixed by the agreement, and after the expiration thereof, or, if the agreement is terminable on notice, then from the expiration of any notice given thereunder, the sum so payable or the rebate so allowed shall be increased in proportion to the amount by which the aggregate of the conveyance rate and station and service terminals may have been increased since the date of the agreement:
(3) Where at the passing of this Act there is no express agreement as to the amount to be paid for such services, but the siding owner in fact pays station terminals and service terminals or any portion thereof or either of them, the siding owner shall hereafter pay for such services as aforesaid the station terminals and service terminals or such portion of the same as he has heretofore paid
(4) Where after the passing of this Act a new siding is connected with the railway, or traffic which is not provided for under the foregoing provisions of this section passes to an existing siding, the siding owner shall pay for the aforesaid services the amount of the station and service terminals for the time being in force; provided that the sum thereafter agreed or in default of agreement determined by the rates tribunal to be payable for such services shall be payable from the date of such connection for traffic or of the passing of the traffic as the case may be or for a period of twelve months from the date of application to the tribunal, whichever is shorter:
Provided that nothing contained in this section shall give rise to any presumption as to the value of the aforesaid accommodation and services, and in fixing any sum which the siding owner is to pay the rates tribunal shall have regard only to what sum is reasonable in all the circumstances of the case.
(2) The Railway and Canal Commission shall not, after the passing of this Act, exercise any jurisdiction with respect to the matters to which this section relates.
