(a) Information is confidential if the information is collected, assembled, or maintained by or for a governmental entity for the purpose of preventing, detecting, responding to, or investigating an act of terrorism or related criminal activity or a hostile act by a foreign adversary of the United States and:
(1) relates to the staffing requirements of an emergency response provider, including a law enforcement agency, a fire-fighting agency, or an emergency services agency;
(2) relates to a tactical plan of the provider; or
(3) consists of a list or compilation of pager or telephone numbers, including mobile and cellular telephone numbers, of the provider.
(b) In this section and Sections 418.177-418.183, "governmental entity" includes the governing body of a nonprofit corporation organized under Chapter 67, Water Code, that provides a water supply or wastewater service, or both, and is exempt from ad valorem taxation under Section 11.30, Tax Code.