Annex - Unified interpretation to MARPOL Annex VI
Time of replacement of an engine
Nitrogen oxides (NOX)
Regulation 13.2.2 reads as
"For a major conversion involving the replacement of a marine diesel
engine with a non-identical marine diesel engine or the installation
of an additional marine diesel engine, the standards in this
regulation in force at the time of the replacement or addition of
the engine shall apply."
The term "time of the replacement or addition" of the engine in
regulation 13.2.2 of MARPOL Annex VI is to be taken as the date of:
the contractual delivery date of the engine to the ship; or
in the absence of a contractual delivery date, the actual
delivery date of the engine to the ship*, provided that the date
is confirmed by a delivery receipt; or
in the event the engine is fitted on board and tested for its
intended purpose on or after 1 July 2016, the actual date that
the engine is tested on board for its intended purpose applies
in determining the standards in this regulation in force at the
time of the replacement or addition of the engine.
The date in paragraphs .1, .2 or .3 above, provided the conditions
associated with those dates apply, is the "Date of major conversion –
According to regulation 13.2.2" to be entered in the IAPPC Supplement.
In this case, the "Date of installation", which applies only for
identical replacement engines, shall be filled in with "N.A.".
If the engine is delivered in accordance with either paragraphs .1 or .2
above before 1 January 2016 but not tested before 1 July 2016 due to
unforeseen circumstances beyond the control of the shipowner, then the
provisions of "unforeseen delay in delivery" may be considered by the
Administration in a manner similar to MARPOL Annex I UI4.