13Where, by an agreement in force immediately before the appointed day and made in pursuance of sub-paragraph (3) of paragraph 1 of Schedule 1 to the Registered Designs Act 1949, terms are agreed upon which use of a design may be made by virtue of that paragraph for the manufacture of articles by the department of the Postmaster General, or the manufacture and supply to that department of articles by a person authorised by it.—
(a)the agreement shall (so far as it relates to the use of the design by, or with the authority of, that department) have effect as from the appointed day as if, for any reference to use by virtue of that paragraph, whether or not it is expressed to be for any purpose referable to functions of the Postmaster General, there were substituted a reference to use by virtue of this paragraph for any purpose referable to functions of the Post Office corresponding to a purpose referable to functions of the Postmaster General, being a purpose in the case of which use of the design therefor fell within the agreement, and the rights and liabilities of the Postmaster General subsisting immediately before the appointed day under the agreement shall on that day vest in the Post Office by virtue of this paragraph, and paragraph 2 of Schedule 9 to this Act shall apply as it does where rights and liabilities so vest by virtue of sections 16 to 18 of this Act;
(b)the Post Office shall have power to use the design for the manufacture of articles on the terms of the agreement as it has effect by virtue of this paragraph, and any person authorised by the Post Office in writing shall have power to use the design for manufacture and supply to the Post Office on such terms.