Local governments and school districts that provide marriage benefits to same-sex couples are violating the Texas Constitution, according to an opinion issued today by Texas Attorney General Greg Abbott.

State Senator Dan Patrick (R-Houston) sought the ruling last November, arguing that Texas amended its constitution in 2005 to define marriage as between one man and one woman, while prohibiting government entities from recognizing anything similar to marriage.

“By creating domestic partnerships and offering health benefits based on them, the political subdivisions have created and recognized something not established by Texas law,” Abbott wrote in the opinion.

The cities of El Paso, Austin and Forth Worth have offered some benefits to domestic partners. Pflugerville ISD became the state’s first school district to extend similar benefits.

See the entire opinion below.