Missouri’s last abortion clinic might have to stop providing the procedure by the end of the week because of a standoff with state officials over an audit.

Lawyers for the clinic, which is operated by Planned Parenthood, say that the audit, which began this spring, has become wide-ranging and includes demands they consider to be unreasonable. They say the clinic’s license is due to expire at midnight on June 1, and if the disagreement is not sorted out by then, the clinic will be forced to stop providing abortions.

Helene Krasnoff, head of litigation at Planned Parenthood Federation of America, said the group filed suit on Tuesday in court in St. Louis, where the clinic is, to try to prevent that outcome. A hearing scheduled for Wednesday was postponed until Thursday at 10:30 a.m. Central time.

If the clinic’s license is not renewed, Missouri would become the first state in the United States without access to abortion services since 1974, the year after the Supreme Court extended federal protections for the procedure in its landmark Roe v. Wade decision.