If review indicates that U.K. imports of 27 million tons or other U.K. services can be reduced without impairing the most effective use of our combined resources, tonnage to be allocated will be correspondingly reduced.

That any economies effected in any way in use of U.K. or U.S. controlled ships employed in U.K. service will be reflected in reduction of additional tonnage to be allocated to such service.

That if U.S. controlled ships losses exceed estimated losses, it may be necessary to make drastic adjustment in amount of U.S.A. controlled tonnage to be allocated.

That if U.S.A. construction programme fails to meet estimated volume of production, adjustment downward in amount of tonnage to be allocated may become necessary.

That if military urgency demands, the amount of U.S.A. tonnage to be allocated to British service may be diminished.

That all services U.S.A. as well as U.K. will be subjected to continuous review…

That in addition, and even though none of limitations enumerated above come to pass, the impossibility of allocating the required tonnage during first four months of 1943 will make it impracticable if not impossible to allocate throughout first half of 1943 one half of presently estimated tonnage required during entire year.