(ii) any other equivalent method, approved by the Administration
taking into account relevant guidelines to be
developed by the Organization, is applied to reduce
onboard NOx emissions at least to the limit specified in
sub-paragraph (a) of this paragraph.
Regulation 14
Sulphur oxides (SOx)
General requirements
(1) The sulphur content of any fuel oil used on board ships shall not
exceed 4.5% m/m.
(2) The world-wide average sulphur content of residual fuel oil supplied
for use on board ships shall be monitored taking into account
guidelines to be developed by the Organization.*
Requirements within SOx emission control areas
(3) For the purpose of this regulation, SOx emission control areas shall
include:
(a) the Baltic Sea area as defined in regulation 10(1)(b) of Annex I;
and
(b) any other sea area, including port areas, designated by the
Organization in accordance with criteria and procedures for
designation of SOx emission control areas with respect to the
prevention of air pollution from ships contained in appendix III
to this Annex.
(4) While ships are within SOx emission control areas, at least one of the
following conditions shall be fulfilled:
(a) the sulphur content of fuel oil used on board ships in a SOx
emission control area does not exceed 1.5% m/m;
(b) an exhaust gas cleaning system, approved by the Administration
taking into account guidelines to be developed by the
Organization, is applied to reduce the total emission of sulphur
oxides from ships, including both auxiliary and main propulsion
engines, to 6.0 g SOx/kW h or less calculated as the total weight
of sulphur dioxide emission. Waste streams from the use of such
equipment shall not be discharged into enclosed ports, harbours
and estuaries unless it can be thoroughly documented by the
ship that such waste streams have no adverse impact on the
ecosystems of such enclosed ports, harbours and estuaries, based
* Refer to resolution MEPC.82(43), Guidelines for monitoring the world-wide average
sulphur content of residual fuel oils supplied for use on board ships; see item 9 of the additional