If an offer for a lease under the provisions of this section for deposits other than oil shale is based upon a mineral location, the validity of which might be questioned because the claim was based on a placer location rather than on a lode location, or vice versa, the offeror shall have a preference right to a lease if the offer is filed not more than one year after September 2, 1960.
With respect to gilsonite (including all vein-type solid hydrocarbons) a lease under the multiple use principle may issue notwithstanding the existence of an outstanding lease issued under any other provision of this chapter.