You may take possession of a child from a law enforcement officer only if you meet the requirements of 40 TAC Chapter 745, Subchapter H, Division 2 (relating to Taking Possession of a Child Directly from a Law Enforcement Officer).
26 Tex. Admin. Code § 749.1185
The provisions of this §749.1185 adopted to be effective January 1, 2007, 31 TexReg 7469; transferred effective March 9, 2018, as published in the Texas Register February 16, 2018, 43 TexReg 909; Amended by Texas Register, Volume 43, Number 26, June 29, 2018, TexReg 4463, eff. 7/29/2018