5) secure gun storage or safety devices will be available at any place in which firearms are sold under the license to persons who are not licensees ("secure gun storage or safety defined in 18 U.S.C. 921 (a) (34) ) The requirement to certify to the availability of gun storage or safety devices was enacted on October 22, 1998, by Public Law 105-277. The requirement is codified in section 923 (d (1) (G) of the GCA and became effective 180 days after the date of enactment. [18 U.S.C. 923 (d) (1) , 27 CFR 478.47 (b)] http://www.atf.gov/forms/index.htm