2.1.1 The purpose of these Guidelines is to specify
the requirements for the testing, survey certification and verification
of exhaust gas cleaning (EGC) systems under regulation 4 to ensure
that they provide effective equivalence to requirements of regulations
14.1 and 14.4 of Annex VI of MARPOL 73/78.
2.1.2 The Guidelines permit two schemes; Scheme
A (Unit Certification with Parameter and Emission Checks, and Scheme
B (Continuous Emission Monitoring with Parameter Checks).
2.1.3 For ships which are to use an exhaust gas
cleaning system in part or in total in order to comply with regulations
14.1 and/or 14.4 of MARPOL Annex VI there should be an approved SOxEmissions Compliance Plan (SECP).