U.S. Citizenship and Immigration Services (USCIS) issued guidance a day before the unofficial marijuana holiday that makes clear working in the marijuana industry, or even just possessing cannabis could be grounds to reject a citizenship application—regardless of whether it is done in a state where it is legal.

Violations of federal marijuana laws “are generally a bar to establishing good moral character for naturalization, even where that conduct would not be an offense under state law,” according to the guidance issued Friday. Merely being “involved in certain marijuana-related activities” could be sign that an applicant for citizenship “may lack good moral character” regardless of whether “such activity has been decriminalized under applicable state laws,” according to the USCIS statement.