; (2) the use of locked metal cabinets and fireproof safes; (3) security systems, video monitoring, and antitheft alarms; (4) security gates, strong locks, and site hardening; (5) concrete bollards and other access controls, if necessary; and (6) the use of any other security-enhancing features appropriate for the licensee’s specific circumstances. . (2) Applicability The regulations prescribed under section 926(d)(1) of such title shall not apply to a person who, on the date of the enactment of this Act, is a licensee referred to in section 923(m) of such title, until the earlier of— (A) the date the person complies with subsection (b)(2) of this section; or (B) the end of the 1-year period that begins with the date regulations are prescribed under section 926(d) of such title. 6. Business inventory firearms (a) Requirement To transfer firearm in personal collection to business inventory before disposition Section 923(c) of title 18, United States Code, is amended— (1) by striking the 2nd sentence and inserting the following: Nothing in this chapter shall be construed to prohibit a licensed manufacturer, licensed importer, or licensed dealer from maintaining a personal collection of firearms. ; (2) by striking the 3rd sentence