Under the regulations implementing MARPOL, a mobile offshore drilling unit is required to have an International Oil Pollution Prevention (IOPP) Certificate when the unit __________.

Correct Answer: Option A — engages in a voyage to a port of another country which is a party of MARPOL

MARPOL Annex I requires an IOPP Certificate for any MODU engaged in international voyages to ports or offshore terminals of other signatory nations. This certification verifies that the unit's oil discharge monitoring and control systems, oily water separators, and piping arrangements meet the stringent requirements for preventing marine pollution.