Sec.30.06. Trespass by holder of license to carry concealed handgun.
(b)For purposes of this section, a person receives notice if the owner of the property or someone with apparent authority to act for the owner provides notice to the person by oral or written communication.
(c)In this section:
(1)"Entry" as assigned by Sec.30.05(b)
(2)"License holder' as assigned by Sec.46.035(f).
(3)"Written communication" means:
(A)a card or other document on which is written language identical to the following: "Pursuant to Section 30.06, Penal Code (trespass by holder of license to carry a concealed handgun), a person licensed under Art.4413(29ee), Revised Statutes (concealed handgun law), may not enter this property with a concealed handgun"; or
(B)a sign posted on the property that:
(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.
From the TSRA website Selected Texas Firearm Statutes
(edited because somehow I managed to post it twice....)