On a vessel carrying grades A，B，C or D cargoes，enclosed spaces where sources of vapor ignition are normally present shall NOT be segregated from cargo tanks by（）.

Every existing product carriers of 40000 tons deadweight and above shall be provided with segregated ballast tanks and shall comply with the specified requirements，or，alternatively，operate with（）in accordance with the convention.

Any oil tanker which is not required to be provided with segregated ballast tanks in accordance with this paragraph may，however，be qualified as a segregated ballast tanker （）it complies with the other requirements of paragraphs of this Convention.

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

Individual wires，used in systems greater than 50 volts,（）.

On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.

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.

In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.

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

Protective clothing must be worn while sampling hazardous cargo on a tanker，and as a minimum includes（）.