Texas Occupations Code - OCC § 1702.108. Guard Company

(1) prevent entry, larceny, vandalism, abuse, fire, or trespass on private property;

(2) prevent, observe, or detect unauthorized activity on private property;

(3) control, regulate, or direct the movement of the public, whether by vehicle or otherwise, only to the extent and for the time directly and specifically required to ensure the protection of property;

(4) protect an individual from bodily harm including through the use of a personal protection officer;  or

(5) perform a function similar to a function listed in this section.