4 Amendment of the principal regulations—applications by interested planning authorities
After regulation 13 of the principal regulations insert new regulation 13A as follows—

“13A Applications by an interested planning authority
1 An application for express consent made by an interested planning authority (whether solely or jointly with any other person) to display an advertisement shall be determined by the authority concerned unless the application is referred to the Secretary of State under section 77 of the Act for determination by him.
2 Any consent granted pursuant to paragraph (1) shall expire—
(a) at the end of such period as the authority may specify in granting the consent; or
(b) where no period is so specified, at the end of a period of 5 years; or
(c) the date on which the interested planning authority ceases (whether solely or jointly) to display the advertisement,
whichever is the earlier.”