单项选择题 Existing crude oil tankers may，（）being provided with segregated ballast tanks or operating with a cargo tank cleaning procedure using crude oil washing，operate with dedicated clean ballast tanks in accordance with the specified provision of the Regulation.

单项选择题 Every oil tanker operating with dedicated clean ballast tanks shall be（）with a Dedicated Clean Ballast Tank Operation Manual detailing the system and specifying operational procedures.

单项选择题 Every new crude oil tanker of 20000 tons deadweight and above shall be fitted with a cargo tank cleaning system using（）.