Venezuelan oil contractors are continuing their work with Chevron Corp. and have not been warned of an impending shutdown despite a US government deadline to stop producing oil there by early April.

The Trump administration formally revoked on Tuesday the license that allows oil giant Chevron Corp. to sell Venezuelan oil in the United States, giving the U.S. company only 30 days to wind down its operations in the South American country.

Trump’s slashed Chevron’s license to drill and export oil in Venezuela. Now, Chevron is calling for long-lasting legislation.