1.1.1 The Marine Environment Protection Committee
(MEPC) adopted resolution MEPC.2(VI), Recommendation on International Effluent Standards and Guidelines
for Performance Tests for Sewage Treatment Plants in 1976.
MEPC 55 in October 2006 adopted, by resolution
MEPC.159(55), the Revised Guidelines on implementation
of effluent standards and performance tests for sewage treatment plants,
which superseded resolution MEPC.2(VI).
1.1.2 MEPC 62 adopted resolution MEPC.200(62) amending MARPOL by designating the Baltic Sea as a
special area under Annex IV and prohibiting the discharge of sewage effluent from
passenger ships operating in special areas, unless a passenger ship has in operation an
approved sewage treatment plant implementing effluent standards and performance tests
defined in the 2012 Guidelines on implementation of effluent standards and
performance tests for sewage treatment plants (the Guidelines).
1.1.3 MEPC 69 adopted resolution MEPC. 274(69) amending regulations 1 and 11 of MARPOL Annex
IV concerning the Baltic Sea Special Area as well as the appendix to MARPOL
Annex IV concerning the Form of the International Sewage Pollution
Prevention.