For purposes of this subchapter—

(1) the term “armor vest” means—

(A) body armor, no less than Type I, which has been tested through the voluntary compliance testing program operated by the National Law Enforcement and Corrections Technology Center of the National Institute of Justice (NIJ), and found to meet or exceed the requirements of NIJ Standard 0101.03, or any subsequent revision of such standard; or

(B) body armor that has been tested through the voluntary compliance testing program, and found to meet or exceed the requirements of NIJ Standard 0115.00, or any revision of such standard;

(2) the term “body armor” means any product sold or offered for sale as personal protective body covering intended to protect against gunfire, stabbing, or other physical harm;

(3) the term “State” means each of the 50 States, the District of Columbia, the Commonwealth of Puerto Rico, the United States Virgin Islands, American Samoa, Guam, and the Northern Mariana Islands;

(4) the term “unit of local government” means a county, municipality, town, township, village, parish, borough, or other unit of general government below the State level;

(5) the term “Indian tribe” has the same meaning as in section 5304(e) of title 25; and

(6) the term “law enforcement officer” means any officer, agent, or employee of a State, unit of local government, or Indian tribe authorized by law or by a government agency to engage in or supervise the prevention, detection, or investigation of any violation of criminal law, or authorized by law to supervise sentenced criminal offenders.