The obstacles to British escort orders in American yards

What changes if the Royal Navy subcontracts more escort construction to American yards before 1940?

The plan faces legal, standards, and capacity barriers because the United States was foreign and many later wartime yards were not yet available.

Orders in Commonwealth yards differed legally and practically from contracts in a neutral United States. Shared terminology could conceal incompatible measurements and industrial standards. Many of the American yards that later supported wartime output did not yet exist in 1938-40. Early subcontracting therefore faced political, technical, and capacity barriers before a ship design even reached production.