From The Truth About Guns:

According to the text of HB 1715, any government entities, courts or contractors who use such properties “may not in any manner prohibit a license holder who is carrying a handgun under the authority of Subchapter H, Chapter 411, Government Code, from entering or remaining on the property or a portion of the property, including through the provision of notice by a communication described by Section 30.06 or 30.07, Penal Code, unless license holders are otherwise prohibited from carrying handguns on the property or that portion of the property under Section 46.03, Penal Code, or other law.”