(1)  A permit authority who has issued a certificate of likely compliance (permit plumbing work) may amend the certificate at any time before a plumbing permit has been issued in respect of the permit plumbing work to which the certificate relates.

(2)  If a certificate of likely compliance (permit plumbing work) has been submitted with an application for a plumbing permit, the certificate forms part of the application and may be amended as part of the application.

(3)  If a certificate of likely compliance (permit plumbing work) was submitted with the application for a plumbing permit and the permit was granted, the certificate forms part of the plumbing permit and may be amended as part of that permit.