The Trump administration plans to allow 30,000 more foreign workers temporarily into the United States for seasonal work through the end of September, a move that reflects how the booming economy has complicated President Donald Trump’s efforts to restrict legal immigration.

Details of the plan were in a draft rule obtained by The Associated Press. It would benefit oyster shucking companies, fisheries, loggers and seasonal hotels, including Trump’s own Mar-a-Lago club — all of which use the visas to hire migrants for temporary work they say Americans won’t do.

The visas, known as H-2Bs, will be granted only to returning foreign workers who have had the visa before, over the last three fiscal years. Those workers have already been vetted and are trusted and not likely to stay pasta their visa, officials said.

U.S. Citizenship and Immigration Services will begin taking applications from employers on behalf of the workers once the temporary rule is published in the Federal Register, expected on Wednesday.