Colorado Revised Statutes Title 18. Criminal Code § 18-16-106. Holding period

(1) Except as provided in subsection (2) of this section, a purchaser shall hold all valuable articles within the jurisdiction of purchase for a period of thirty days from the date of purchase, during which time the valuable articles shall be held separate and apart from any other transaction and shall not be changed in form or altered in any way. The purchaser shall permit any requesting law enforcement officer to inspect the valuable articles during the thirty-day period.

(2) Stamped and assayed gold and silver bullion and gold coins shall not be subject to the holding requirement imposed by subsection (1) of this section. In lieu of such requirement, the purchaser shall be required to record the identity of any person to whom he transfers any such bullion or coins and the date, time, and place of such transfer.