Hong Kong Regulations

MERCHANT SHIPPING (PREVENTION OF POLLUTION BY SEWAGE) REGULATION - SECT 17

Duration of new sewage certificates where period of validity is extended under section 15 or 16

(1) If the period of validity of an existing ISPP Certificate issued in
respect of a ship has been extended under section 15 or 16, the new
sewage certificate issued in respect of the ship as a result of a
renewal survey is valid from the date of completion of the survey to a date
not exceeding 5 years from the expiry date of the existing ISPP  Certificate
before the extension was granted.

(2) Notwithstanding subsection (1), where the Director considers appropriate,
a new sewage certificate may be valid from the date of completion of the
relevant survey to a date not exceeding 5 years from the date of completion of
the survey.