‘ 4. Application. This section does not apply to:
A. The sale of a firearm if the seller knows that the person to whom the seller is selling the firearm is:
(1) A law enforcement officer as defined by Title 17-A, section 2, subsection 17;
(2) A corrections officer as defined by section 2801-A, subsection 2; or
(3) A person who is employed by a contract security company or proprietary security organization as defined by Title 32, section 9403 or a person who is licensed as a private security guard under Title 32, chapter 93; or
B. The sale of a firearm to a firearm dealer.
A firearm dealer, as defined in 18 United States Code, Section 921, is subject to the requirements of conducting national instant criminal background checks under 18 United States Code, Section 922(t).’