A dispute over whether to shut down Toledo's last abortion clinic is headed to the Ohio Supreme Court Tuesday, in a case both sides view as pivotal.

At issue in oral arguments will be the state health department's 2014 order shutting down Capital Care of Toledo for lack of a patient-transfer agreement, which would formally authorize the transfer of patients from the clinic to a local hospital.

Such agreements were mandated, and public hospitals barred from providing them, under restrictions Ohio lawmakers passed in 2013. The change prompted the University of Toledo Hospital, which is public, to withdraw from its transfer arrangement with Capital Care.

The clinic sued and won in the lower courts, which ruled the restrictions were unconstitutional. Judges have allowed the clinic to continue operating as the legal dispute continues.

Republican Attorney General Mike DeWine appealed to the high court last year, asking that justices uphold the state's action and shut the clinic down. In a divided vote in March, the court agreed to take up the case.

After the Republican-controlled state Legislature opted to outlaw transfer agreements with public hospitals, Capital Care went out of state, negotiating its required agreement with the University of Michigan Health System in Ann Arbor.