Tex. Penal Code § 46.14
"IT IS UNLAWFUL TO STORE, TRANSPORT, OR ABANDON AN UNSECURED FIREARM IN A PLACE WHERE CHILDREN ARE LIKELY TO BE AND CAN OBTAIN ACCESS TO THE FIREARM."
(a) A person commits an offense if the person knowingly engages in the business of transporting or transferring a firearm that the person knows was acquired in violation of the laws of any state or of the United States. For purposes of this subsection, a person is considered to engage in the business of transporting or transferring a firearm if the person engages in that conduct:
Added by Acts 2009, 81st Leg., R.S., Ch. 153 (S.B. 2225), Sec. 1, eff. September 1, 2009.