TO BE KEPT UNDER LOCK AND KEY. It is requested that special care may be taken to ensure the secrecy of this document. (THIS DOCUMENT IS THE PROPERTY OF HIS BRITANNIC MAJESTY'S GOVERNMENT) S E C R E T. C.O.S.(41) 273. COPY NO. 6 30TH APRIL, 1941. WAR CABINET. CHIEFS OF STAFF COMMITTEE. PROTECTION OF OIL REFINERIES IN THE DUTCH WEST INDIES. Memorandum by the Oil Control Board. As a result of a recent review of the tanker situation, it became evident that the available tonnage was not sufficient to meet our estimated requirements of imported petroleum products.