PART 4 Survey and Certification of Ships

19 Extension of periods of validity of Sewage Certificates by a surveyor
1 A surveyor may extend the period of validity of a Sewage Certificate issued in respect of as United Kingdom ship by endorsing that Certificate if—
(a) a renewal survey has been completed by the surveyor;
(b) the surveyor is satisfied that the structure, equipment, systems, fittings, arrangements and materials of the ship fully comply with the requirements of Part 3 (equipment); and
(c) the new Sewage Certificate cannot be issued or placed on board the ship before the date on which the existing Sewage Certificate is due to expire.
2 An endorsement issued pursuant to paragraph (1) must be in the relevant form set out in the Appendix.
3 Where a Sewage Certificate has been endorsed under paragraph (1), that Certificate is valid for such further period as is specified in the Certificate, not exceeding five months beginning with the original date of expiry of the Certificate.