... a crude oil tanker of 20 000 tonnes deadweight and above or a product carrier of 30 000 tonnes deadweight and above, not meeting the requirements of a new oil tanker as defined in Regulation 1 (26) of Annex I to Marpol 73/78, will be subject to expanded inspection ... if the ship's wing tanks or double-bottom spaces not used for the carriage of oil meet the requirements of Regulation 13G (4) of that Annex ...
The revised Regulation 13G of Annex I of MARPOL 73/78 maintains the requirements for Category (1) tankers, after 25 years, to have wingtanks or double bottoms in protective locations not used for the carriage of cargo or to operate only with hydrostatically balanced loading.
