A dealer may not sell, offer for sale, rent, or transfer a handgun manufactured on or before December 31, 2002, unless the handgun is sold, offered for sale, rented, or transferred with an external safety lock. A dealer may not sell, offer for sale, rent, or transfer a handgun manufactured on or after January 1, 2003, unless the handgun is sold, offered for sale, rented, or transferred with an approved integrated mechanical safety device. The provisions of this regulation do not apply to: An antique firearm; A firearm modified to render it permanently inoperative; A sale or transfer by a dealer or manufacturer to a lawful customer outside the State; or A purchase, sale, transfer, or transport to or by a dealer or manufacturer that provides or services a handgun for: Personnel of the United States government or an agency or department of the United States government; Members of the armed forces of the United States or the National Guard; Law enforcement personnel of the State or any local law enforcement agency in the State while acting within the scope of their official duties; or An organization that is required by federal law or regulations governing its specific business or activity to maintain handguns and applicable ammunition.