Texas Agriculture Code - AGRIC § 301.102. Exemptions

(1) research, development, and experiments conducted by state and federal agencies, institutions of higher learning, and bona fide nonprofit research organizations;

(2) laboratory research and experiments;

(3) activities of an emergent nature for protection against fire, frost, sleet, or fog; and

(4) activities normally conducted for purposes other than inducing, increasing, decreasing, or preventing precipitation or hail.