COLUMBUS, Ohio (AP) — Operators of a Dayton abortion clinic are fighting to keep their license after being denied an exception to state rules requiring the facility to have an emergency patient transfer agreement with a hospital.

The city’s lone clinic has sought a variance from state health officials since 2012.

Health Director Rick Hodges denied a request last year.

He said the center’s two backup doctors weren’t enough to provide 24-hour emergency coverage to patients.

A subsequent variance request adding a third doctor was denied in September.

A license revocation hearing is scheduled for Tuesday.

About half of Ohio’s abortion clinics have closed as state lawmakers have passed a series of restrictions to their operations.

A federal judge has said the center can remain open while it fights to keep its license.