69Exemptions from charges
(1)Except in so far as may be agreed between the Authority and the government department concerned or as may be specifically laid down by statute, nothing in any enactment authorising the Authority to levy charges shall extend to authorise the Authority to levy charges on—
(a)a vessel—
(i)belonging to or in the service of Her Majesty or any member of the Royal Family; or
(ii)in the service of the Commissioners of Customs and Excise, not being a vessel carrying goods for reward; or
(iii)in the service of Trinity House and not carrying goods for reward;
(b)the Commissioners of Customs and Excise in respect of a vessel or goods under customs seizure;
(c)troops landed at the docks or a person employed by the Secretary of State for Defence while in the execution of his duty;
(d)goods or stores belonging to the Secretary of State for Defence.
(2)A person who takes the benefit of an exemption under subsection (1) of this section but is not entitled thereto shall be liable on summary conviction to a fine not exceeding twenty pounds.