131 
Regulation 7 
DURATION OF CERTIFICATE 
(1) An International Sewage Pollution Prevention Certificate (1973) shall be 
issued for a period specified by the Administration, which shall not exceed five 
years from the date of issue, except as provided in paragraphs (2), (3) and (4) 
of this Regulation. 
(2) If a ship at the time when the Certificate expires is not in a port or off- 
shore terminal under the jurisdiction of the Party to the Convention whose flag 
the ship is entitled to fly, the Certificate Inay be extended by the Administration, 
but such extension shall be granted only for the purpose of allowing the ship to 
complete its voyage to the State whose flag the ship is entitled to fly or in which 
it is to be surveyed and then only in cases where it appears proper and reason- 
~ able to do so. 
(3) No Certificate shall be thus extended for a period longer than five months 
and a ship to which such extension is granted shall not on its arrival in the 
State whose flag it is entitled to fly or the port in which it is to be surveyed, be 
entitled by virtue of such extension to leave that port or State without having 
obtained a new Certificate. 
(4+) A certificate which has not been extended under the provisions of para- 
graph (2) of this Regulation may be extended by the Administration for a 
period of grace of up to one month from the date of expiry stated on it. 
(5) A Certificate shall cease to be valid if significant alterations have taken 
place in the equipment, fittings, arrangement or material required without the 
approval of the Administration, except the direct replacement of such equip- 
ment or fittings. 
(6) A Certificate issued to a ship shall cease to be valid upon transfer of such 
a ship to the flag of another State, except as provided in paragraph (7) of this 
Regulation. 
(7) Upon transfer of a ship to the flag of another Party, the Certificate shall 
remain in force for a period not exceeding five months provided that it would 
not have expired before the end of that period, or until the Administration issues 
n replacement Certificate, whichever is earlier. As soon as possible after the 
transfer has taken place the Government of the Party whose flag the ship was 
formerly entitled to fiy shall transmit to the Administration a copy of the Cer- 
tificate carried by the ship before the transfer and, if available, a copy of the 
relevant survey report. 
Regulation 8 
DISCHARGE OF SEWAGE 
(1) Subject to the provisions of Regulation 9 of this Annex, the discharge of 
sewage into the sea is prohibited, except when: 
(a) the ship is discharging comminuted and disinfected sewage using a 
system approved by the Administration in accordance with Regulation 3(1) 
(a) at a distance of more than four nautical miles from the nearest land, 
or sewage which is not comminuted or disinfected at a distance of more than 
12 nautical miles from the nearest land, provided that in any case, the 
sewage that has been stored in holding tanks shall not be discharged in- 
stantaneously but at a moderate rate when the ship is en route and proceed- 
ing at not less than 4 knots; the rate of discharge shall be approved by the 
Administration based upon standards developed by the Organization; or 
(b) the ship has in operation an approved sewage treatment plant which 
has been certified by the Administration to meet the operational require- 
ments referred to in Regulation 3(1) (a) (i) of this Annex, and 
(i) the test results of the plant are laid down in the ship’s Inter- 
national Sewage Pollution Prevention Certificate (1973) ; 
(ii) additionally, the effluent shall not produce visible floating solids 
in, nor cause discolouration of, the surrounding water; or 
(ce) the ship is situated in the waters under the jurisdiction of a State 
and is discharging sewage in accordance with such less severe requirements 
as may be imposed by such State. 
(2) When the sewage is mixed with wastes or waste water having different 
discharge requirements, the more severe requirements shali apply. 
