Section 11: Special Prohibitions

Except with the written permission of the Postmaster-General, the following persons are hereby forbidden from carrying or receiving, collecting or delivering any letter, although they may not have received any hire or reward for the same-(a) common carriers, except letters concerning goods which they are conveying;
(b) officers of the Postal Service, except in the discharge of their duties;
(c) owners, masters or commanders of vessels, sailing or passing coastwise or otherwise between posts or places in Nigeria, except in respect of letters belonging to the owners of such vessels, or letters carried for the Postal Service;
(d) passengers of, or members of the crew or others on board a vessel, passing or re-passing on a river, lagoon, or navigable canal in Nigeria, except with respect to places in Nigeria with which postal communications have not been established, or with respect to letters carried for the Postal Service.