A New York county clerk used the state’s shield law to stop Texas from punishing a New York doctor for prescribing and sending abortion medication to a Texas woman.

The move is the latest escalation in an interstate battle between New York and Texas, their differing abortion laws and the future of Margaret Carpenter, a New York state doctor who works at a telemedicine abortion organization.

In December, Texas Attorney General Ken Paxton filed a lawsuit against Carpenter for violating the state’s abortion ban after she allegedly prescribed and mailed abortion medication to a 20-year-old Texan woman.

Neither Carpenter nor her lawyer responded to the lawsuit or showed up to a hearing regarding the charges in Texas last month, according to The New York Times.

A Texas judge ordered Carpenter last month to pay more than $100,000 in penalties for prescribing abortion medication to the Texas woman. The Texas attorney general’s office then followed up with the New York clerk’s office to see if it would enforce the default civil judgment.

But the country clerk refused.