(a) The requirement of registration is waived for the following persons in the circumstances described in this section:

(1) Any officer or employee of the Administration, any customs officer, any officer or employee of the U.S. Food and Drug Administration, and any Federal or Insular officer who is lawfully engaged in the enforcement of any federal law relating to listed chemicals, controlled substances, drugs, or customs, and is duly authorized to possess and distribute List I chemicals in the course of his/her official duties; and

(2) Any officer or employee of any State, or any political subdivision or agency thereof, who is engaged in the enforcement of any State or local law relating to listed chemicals and controlled substances and is duly authorized to possess and distribute List I chemicals in the course of his official duties.

(b) Any official exempted by this section may, when acting in the course of official duties, possess any List I chemical and distribute any such chemical to any other official who is also exempted by this section and acting in the course of official duties.