(a) A person who takes or retains possession of a child or who conceals the whereabouts of a child in violation of a possessory right of another person may be liable for damages to that person.
(b) A possessory right is violated by the taking, retention, or concealment of a child at a time when another person is entitled to possession of or access to the child.
Official text of the Texas Family Code as published by the Texas Legislative Council.