Most probably a state exception to the Airborne Hunting Act of 1972 (see below.)
The Airborne Hunting Act is a federal law in the United States that prohibits shooting or harassing wildlife from an aircraft. It was enacted in 1972 to prevent private hunters from using planes to hunt or harass animals like wolves. The Act makes it illegal to shoot or attempt to shoot wildlife from a plane, use a plane to harass wildlife, or knowingly participate in such activities.
The Act does have exceptions for wildlife management activities conducted under the authority of a federal or state permit. This allows for authorized wildlife management practices, like those involving feral hogs and other species in some states.
I will not comment on the ethics vs legality of hunting from aircraft such as the totally legal hunting of big game animals from aircraft in New Zealand.
I would think that the Texas Wildlife Department used detailed, science-based management studies and not quick knee-jerk emotions before presenting this legislation.
I’m sure the anti-hunting community will follow soon with the usual state and federal lawsuits.
Happy hunting to all, TheGrayRider a/k/a Tom.