12. F22 [ (1) Subject to paragraph (3) , a fire safety certificate shall be required in respect of all works or buildings to which this Part applies. ]

(2) Where a fire safety certificate is required in respect of works or a building, a person shall not carry out such works or make a material change of use as regards such a building—

(a) in the absence of a fire safety certificate in respect of the works or building, or

(b) in contravention of any conditions subject to which the certificate is granted.

F23 [ (3) Paragraphs 1 and 2 shall not apply where a 7 day notice has been submitted to the relevant building control authority pursuant to Article 20A . ]