11 GCA § 28109: Reports by Importers and Others.

For the purpose of enabling the Commissioner to determine whether or not the provisions of this Chapter are being complied with and to prevent evasion of the tax hereby imposed, every person who imports any property into Guam or who acquired property in Guam from any other person not taxable under 11 GCA, Chapter 26, in respect to the transaction by which the former acquired the same (whether or not he then is, or can then legally be, taxed in respect to such property or the use or consumption thereof under this Chapter) shall make a report to the Commissioner, setting forth, in such reasonable detail as the Commissioner by regulation may prescribe, the description, quantity, character and value thereof, and such information as may be reasonably necessary to determine the taxability or non-taxability of the person making such report in respect to the property covered thereby.