Texas Government Code - GOV'T § 418.1152. Supervision and Control

(1) the response effort must be organized and function in accordance with the National Incident Management System guidelines;

(2) the personnel, equipment, and resources of a responding local government entity being used in the response effort are under the operational control of the requesting local government entity unless otherwise agreed;

(3) direct supervision and control of personnel, equipment, and resources and personnel accountability remain the responsibility of the designated supervisory personnel of the responding local government entity;

(4) unless otherwise agreed in advance, an emergency medical service organization providing assistance under the system shall use the medical protocols authorized by the organization's medical director;

(5) the designated supervisory personnel of the responding local government entity shall:

(6) the responding local government entity's personnel and other resources are subject to recall at any time, subject to reasonable notice to the requesting local government entity.