I always thought it was pretty clear as far as laws generally go. Here's how the old law read:
46.035. UNLAWFUL CARRYING OF HANDGUN BY LICENSE
HOLDER.
(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:....
(6) on the premises of a church, synagogue, or other established
place of religious worship.
.......
(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.
.....
(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.
