I wish you much better luck than I've had figuring this out.
Personally, I just do what I do and not worry about it.
@General Zod - just because you leave your LTC card at home doesn't mean you're not a license holder.
Generally, you are not carrying under authority of Subchapter H, Chapter 411, Government Code, if you are not carrying your license.
Sec. 30.07. TRESPASS BY LICENSE HOLDER WITH AN OPENLY CARRIED HANDGUN. (a) A license holder commits an offense if the license holder:
(1) openly carries a handgun under the authority of Subchapter H, Chapter 411, Government Code, on property of another without effective consent;