Section 43, The Customs Regu- Citation

If the master of an aircraft or ·ship wishes to proceedto a sufferance wharf or any place other than· an approved place of loading or unloading there to load or discharge cargo he must apply to the proper officer for permission in the Form C 9. The proper officer may gra!lt such permission subject to such directions and conditions as he may see fit to impose and to the payment by the master or his agent of fees at the appropriate rates of overtime for each officer employed during the aircraft's or ship's stay at such wharf or place. Sufferance wharves.