Neb. Admin. Code § 350-13-001.01 — Mineral shall mean an inorganic substance found naturally in the earth, including, but not limited to ore, gravel, oil, or natural gas

001.02 Mineral interest shall mean the ownership of any minerals, mines, quarries, mineral springs, overriding royalty interest, and production payments with respect to oil and gas leases. The interest includes the executor rights to sell or lease the property, to receive bonus payments and delay rentals and to participate in the production through royalty payments. 001.02A A producing mineral interest shall be the interest created in a mine, quarry, mineral spring, or oil or gas wells at the time it has come into production and for which production payments are being made or received. Most mineral leases have a term specific until the property subject to lease is made to produce a specific mineral. These leases may be extended for as long as the lessee recovers the min eral subject to the lease in paying quantities. 001.02B A non-producing mineral interest is one in which there is no known activity related to the recovery of a mineral. A mineral lease commonly allows for a bonus rental and delay rentals to be paid to the lessor unless and until the lessee is able to extract in an economically feasible manner the specific mineral subject to the written agreement or lease.