26. If a public body’s notice ceases to be in force and the conditions in paragraph 4(2) of Schedule 4 to the Act (public body’s plans certificate accepted and not rescinded) are satisfied, the local authority may not—
(a)give a notice under section 36(1) of the Act (removal or alteration of work which contravenes building regulations); or
(b)institute proceedings under section 35 of the Act for a contravention of building regulations;
in relation to any work which is described in the certificate and is carried out in accordance with the plans to which the certificate relates.