Following a decision earlier this month to impose a 10% tariff on imported aluminium, the Trump administration has announced an exemption process for US boatbuilders and other manufacturers. The exemption includes certain types of aluminium "not to be produced in the United States in a sufficient and reasonably available amount or of a satisfactory quality and is also authorized to provide such relief based on specific national security considerations.”

The NMMA said that builders can apply for specific exclusion types if they prove sufficient need under the new criteria.

“Marine manufacturers interested in applying for an exclusion for certain types of aluminum, for example wide-width sheet (72 inches or larger), may find more information on the application process in a Federal Register Rules and Regulations document that was released Monday,” said the US trade association. It said it would continue to work with the administration and Congress on the potential side effects of aluminium tariffs on marine users.

The US Department of Commerce is expected to announce higher tariffs this month on aluminium sheeting from China, which would double prices for US builders.