S. 4531, titled the "Ensuring Naval Readiness Act," allows an exception to the rule against building U.S. naval vessels in foreign shipyards. It specifies that naval ships can be constructed in NATO countries or Indo-Pacific countries with a defense treaty with the U.S.,...
Simple Explanation
The bill is like a rule that lets the U.S. build its big navy ships in other friendly countries if it's cheaper, as long as those places aren't connected to China. The Navy has to check and tell others before starting to make sure it's safe and fair.