Here is the law on prohibited places:
PC §46.035. UNLAWFUL CARRYING OF HANDGUN BY LICENSE HOLDER. (a) A license holder commits an offense if the license holder carries a handgun on or about the license holder's person under the authority of Subchapter H, Chapter 411, Government Code, and intentionally fails to conceal the handgun.
(b) A license holder commits an offense if the license holder intentionally, knowingly, or recklessly carries a handgun under the authority of Subchapter H, Chapter 411, Government Code, regardless of whether the handgun is concealed, on or about the license holder's person:
(1) on the premises of a business that has a permit or license issued under Chapter 25, 28, 32, 69, or 74, Alcoholic Beverage Code, if the business derives 51 percent or more of its income from the sale or service of alcoholic beverages for on-premises consumption, as determined by the Texas Alcoholic Beverage Commission under Section 104.06, Alcoholic Beverage Code;
(2) on the premises where a high school, collegiate, or professional sporting event or interscholastic event is taking place, unless the license holder is a participant in the event and a handgun is used in the event;
(3) on the premises of a correctional facility;
(4) on the premises of a hospital licensed under Chapter 241, Health and Safety Code, or on the premises of a nursing home licensed under Chapter 242, Health and Safety Code, unless the license holder has written authorization of the hospital or nursing home administration, as appropriate;
(5) in an amusement park; or
(6) on the premises of a church, synagogue, or other established place of religious worship.
(c) A license holder commits an offense if the license holder intentionally, knowingly, or recklessly carries a handgun under the authority of Subchapter H, Chapter 411, Government Code, regardless of whether the handgun is concealed, at any meeting of a governmental entity.
(d) A license holder commits an offense if, while intoxicated, the license holder carries a handgun under the authority of Subchapter H, Chapter 411, Government Code, regardless of whether the handgun is concealed.
(e) A license holder who is licensed as a security officer under Chapter 1702, Occupations Code, and employed as a security officer commits an offense if, while in the course and scope of the security officer's employment, the security officer violates a provision of Subchapter H, Chapter 411, Government Code.
(f) In this section:
(1) “Amusement park” means a permanent indoor or outdoor facility or park where amusement rides are available for use by the public that is located in a county with a population of more than one million, encompasses at least 75 acres in surface area, is enclosed with access only through controlled entries, is open for operation more than 120 days in each calendar year, and has security guards on the premises at all times. The term does not include any public or private driveway, street, sidewalk or walkway, parking lot, parking garage, or other parking area.
(2) “License holder” means a person licensed to carry a handgun under Subchapter H, Chapter 411, Government Code.
(3) “Premises” means a building or a portion of a building. The term does not include any public or private driveway, street, sidewalk or walkway, parking lot, parking garage, or other parking area.
(g) An offense under Subsection (a), (b), (c), (d), or (e) is a Class A misdemeanor, unless the offense is committed under Subsection (b)(1) or (b)(3), in which event the offense is a felony of the third degree.
(h) It is a defense to prosecution under Subsection (a) that the actor, at the time of the commission of the offense, displayed the handgun under circumstances in which the actor would have been justified in the use of deadly force under Chapter 9.
[double amendment to same provision]
(h-1) *[as added by Acts 2007, 80th Leg., R.S., HB 1889.] It is a defense to prosecution under Subsections (b) and (c) that the actor, at the time of the commission of the offense, was:
(1) an active judicial officer, as defined by Section 411.201, Government Code; or
(2) a bailiff designated by the active judicial officer and engaged in escorting the officer.
(h-1) *[as added by Acts 2007, 80th Leg., R.S., HB 2300.] It is a defense to prosecution under Subsections (b)(1), (2), and (4)-(6), and (c) that at the time of the commission of the offense, the actor was:
(1) a judge or justice of a federal court;
(2) an active judicial officer, as defined by Section 411.201, Government Code; or
(3) a district attorney, assistant district attorney, criminal district attorney, assistant criminal district attorney, county attorney, or assistant county attorney.
(i) Subsections (b)(4), (b)(5), (b)(6), and (c) do not apply if the actor was not given effective notice under Section 30.06.
(j) Subsections (a) and (b)(1) do not apply to a historical reenactment performed in compliance with the rules of the Texas Alcoholic Beverage Commission.
(k) It is a defense to prosecution under Subsection (b)(1) that the actor was not given effective notice under Section 411.204, Government Code.
For hospitals, nursing homes, amusement parks and places of worships a 30.06 sign must be displayed for it to be a criminal offense. All other places with a 30.06 sign are also prohibited and the signs have the force of law. Here is the regulation on 30.06 signs:
PROHIBITING HANDGUNS IN A BUSINESS OR OTHER ENTITY
In order to provide notice that entry on property by a license holder with a concealed handgun is forbidden, Penal Code Section 30.06(c)(3)(A) requires that a written communication contain the following language:
"PURSUANT TO SECTION 30.06, PENAL CODE (TRESPASS BY HOLDER OF A LICENSE TO CARRY A CONCEALED HANDGUN) A PERSON LICENSED UNDER SUBCHAPTER H, CHAPTER 411, GOVERNMENT CODE (CONCEALED HANDGUN LAW), MAY NOT ENTER THIS PROPERTY WITH A CONCEALED HANDGUN."
"CONFORME A LA SECCIÓN 30.06 DEL CÔDIGO PENAL (TRASPASAR PORTANDO ARMAS DE FUEGO) PERSONAS CON LICENCIA BAJO DEL SUB-CAPITULO H, CAPITULO 411, CODIGO DE GOBIERNO (LEY DE PORTAR ARMAS), NO DEBEN ENTRAR A ESTA PROPIEDAD PORTANDO UN ARMA DE FUEGO."
Penal Code Section 30.06(c)(3)(B) further states that a sign must meet the following requirements:
i. includes the language described by Paragraph (A) in both English and Spanish;
ii. appears in contrasting colors with block letters at least one inch in height; and
iii. is displayed in a conspicuous manner clearly visible to the public.
Please note that while the language provided above may be downloaded for convenience, it does not meet the requirements of Section 30.06(c)(3)(B) and may not be used as a sign.
Otherwise if asked you must leave or face trespassing charges.
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