单项选择题 Functions aboard a tanker or tank barge such as connecting，disconnecting，and topping off must be supervised by（）.

单项选择题 For the purpose of（）tank or hold washings from any vessel，an application shall be made to Harbor Authorities for approval.

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.