10 Guam Code Ann. § 60113
(b) Upon the loss, theft, damage beyond repair to any firearm registered under this Chapter, the holder of the identification card applicable to the weapon in question shall report the event to the Department, along with the nature of the disposition of the firearm, if lost, destroyed or damaged beyond repair, and the same information shall be recorded upon the registration records kept by the Department applicable to the firearm involved.
(c) The holder of any identification card or any person in whose name a firearm is registered shall report to the Department any change in the facts stated upon the card and any change in thefacts which would effect the holder’s eligibility to continue to possess a card.
(d) The holder shall report any of the events required to be reported by Subsection (a) and (b) above within three (3) working days of their occurrence and any of the events required to be reported by Subsection (c) within ten (10) days of their occurrence.
SOURCE: GC § 8904.