Senate Bill 390 prohibit purchasing materials or services provided by the ALA.
The fight over book bans has lead to rallies, lawsuits and death threats.
Libraries in the state must adopt an anti-book banning policy to receive state funding.
“I’ve never seen anything like this,” said the American Library Association's Deborah Caldwell-Stone.
Book bans seem to target LGBTQ content and not just "sexually explicit material".