The Trump administration threatened on Friday to withhold federal money from California if the state does not drop its requirement that private insurers cover abortions.

In an announcement on the morning of the March for Life, the high-profile annual anti-abortion rights demonstration, the Department of Health and Human Services said it would give California 30 days to commit to lifting the requirement. If the state does not do so, the administration said it will take steps to cut off money from one or more federal funding streams.

“People should not be forced to participate, or pay for, or cover other people’s abortions,” said Roger Severino, director of the Office for Civil Rights at the Department of Health and Human Services.

The administration issued a notice of violation, declaring that California was not complying with the federal Weldon Amendment, which says that certain funds can be withheld if a state or local government discriminates against a “health care entity” for not providing or paying for abortions.