(a) From recommendations made under Section 418.013(c), Government Code, the department shall designate which vehicles may be operated by which designated organizations as emergency vehicles during declared disasters.
(b) A vehicle designated under Subsection (a) may be operated by a designated organization as if the vehicle were an authorized emergency vehicle under this subtitle if:
(1) the governor declares a state of disaster under Section 418.014, Government Code;
(2) the department requests assistance from the designated organization; and
(3) the vehicle is operated by the designated organization or a member of the designated organization in response to the state of disaster.
(c) The department shall adopt rules as necessary to implement this section.