11 GCA § 24711: Separate Valuation.

Any person showing evidence by a deed, deed of trust, mortgage, or decree of court, of an interest in any parcel of real property, except possessory interest, which does not have a separate valuation on the roll, and who is not the owner or contract purchaser of the entire piece separately assessed, may apply to the tax collector to have the parcel separately valued on the roll for the purpose of paying current taxes.