AUSTIN (CBSDFW.COM/AP) — Texas abortion providers are suing to undo decades-old regulations on doctors and clinics that they say deserve a second look after a landmark U.S. Supreme Court ruling in 2016.

The lawsuit filed Thursday challenges longstanding requirements over ultrasounds, waiting periods and licensing. Courts have already upheld some of the laws.

READ MORE: VIDEO: Local Sign Spinner Aims For World Championship

But the abortion provider Whole Woman’s Health wants a federal judge to take a fresh look through the lens of a major Supreme Court decision that struck down HB2, a 2013 Texas anti-abortion law.

More than half (20+) of Texas’ abortion clinics — including nearly all that served rural and midsized cities — shuttered under that law. Only a handful have reopened.

READ MORE: Fourth Stimulus Check: Is Another Relief Payment Coming Soon?

Texas had 41 abortion clinics in 17 counties the year before the law took effect and 21 clinics in 6 counties the year after — making Dallas, Fort Worth, Houston, Austin, San Antonio and El Paso the only cities with abortion providers.

Republican Texas Attorney General Ken Paxton is a staunch abortion opponent. His office has asked lawmakers to consider expanding the attorney general’s power to enforce abortion laws on the books.

MORE NEWS: Former 737 Max Chief Technical Pilot Enters Innocent Plea To Charge He Deceived The FAA

(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)