In carrying out the provisions of this Subtitle, the County Executive is authorized to utilize the services, equipment, supplies and facilities of the existing departments, bureaus, offices, commissions, committees, authorities and agencies of the County to the maximum extent practicable. The officers, agents, employees and personnel of all such departments, bureaus, offices, commissions, committees, authorities and agencies of the County shall cooperate with and extend all services and facilities to the County Executive, the Office of Emergency Management and to the Director.