(1) A separate zone or deposit under any lease.
(2) A part of a legal subdivision.
(3) Less than 640 acres outside Alaska or of less than 2,560 acres within Alaska.
Structure US Code
Title 30— MINERAL LANDS AND MINING
CHAPTER 3A— LEASES AND PROSPECTING PERMITS
SUBCHAPTER I— GENERAL PROVISIONS
§ 182. Lands disposed of with reservation of deposits of coal, etc.
§ 183. Cancellation of prospecting permits
§ 184. Limitations on leases held, owned or controlled by persons, associations or corporations
§ 185. Rights-of-way for pipelines through Federal lands
§ 187a. Oil or gas leases; partial assignments
§ 187b. Oil or gas leases; written relinquishment of rights; release of obligations
§ 188. Failure to comply with provisions of lease
§ 189. Rules and regulations; boundary lines; State rights unaffected; taxation
§ 190. Oath; requirement; form; blanks
§ 191. Disposition of moneys received
§ 191a. Late payment charges under Federal mineral leases
§ 191b. Collection of unpaid and underpaid royalties and late payment interest owed by lessees
§ 192. Payment of royalties in oil or gas; sale of such oil or gas
§ 192a. Cancellation or modification of contracts
§ 192b. Application to contracts
§ 192c. Rules and regulations governing issuance of certain leases; disposition of receipts