PUBLIC LAWS-CH. 916-AUG. 8 , 1946 Disapproval. Segregated leases. Assignments of parts of leases. Relinquishment of rights under gas and oil leases. Ante, p. 955. 41 Stat. 450. 30 U. S .C. §188. Post,p . 957. Forfeiture of lease. Provision for settle- ment of disputes, etc. Leases subject to cancellation. Ante, p. 961. qualified to own a lease under this Act, and any assignment or sub- lease shall take effect as of the first day of the lease month following the date of filing in the proper land office of three original executed counterparts thereof, together with any required bond and proof of the qualification under this Act of the assignee or sublessee to take or hold such lease or interest therein. Until such approval, however, the assignor or sublessor and his surety shall continue to be responsible for the performance of any and all obligations as if no assignment or sublease had been executed. The Secretary shall disapprove the assignment or sublease only for lack of qualification of the assignee or sublessee or for lack of sufficient bond: Provided, however, That the Secretary may, in his discretion, disapprove an assignment of a sepa- rate zone or deposit under any lease, or of a part of a legal subdivision. Upon approval of any assignment or sublease, the assignee or sublessee shall be bound by the terms of the lease to the same extent as if such assignee or sublessee were the original lessee, any conditions in the assignment or sublease to the contrary notwithstanding. Any partial assignment of any lease shall segregate the assigned and retained por- tions thereof, and as above provided, release and discharge the assignor from all obligations thereafter accruing with respect to the assigned lands; and such segregated leases shall continue in full force and effect for the primary term of the original lease, but for not less than two years after the date of discovery of oil or gas in paying quantities upon any other segregated portion of the lands originally subject to such lease. Assignments under this section may also be made of parts of leases which are in their extended term because of production, and the segregated lease of any undeveloped lands shall continue in full force and effect for two years and so long thereafter as oil or gas is produced in paying quantities." SEC. 8 . The Act is hereby amended by adding a new section to read as follows: "SEC. 30. (b) Notwithstanding any provision to the contrary in section 30 hereof, a lessee may at any time make and file in the appropriate land office a written relinquishment of all rights under any oil or gas lease issued under the authority of this Act or of any legal subdivision of the area included within any such lease. Such relinquishment shall be effective as of the date of its filing, subject to the continued obligation of the lessee and his surety to make payment of all accrued rentals and royalties and to place all wells on the lands to be relinquished in condition for suspension or aban- donment in accordance with the applicable lease terms and regu- lations; thereupon the lessee shall be released of all obligations thereafter accruing under said lease with respect to the lands relin- quished, but no such relinquishment shall release such lessee, or his bond, from any liability for breach of any obligation of the lease, other than an obligation to drill, accrued at the date of the relinquishment." SEC. 9 . Section 31 of the Act is amended to read as follows: "SEC. 31. Except as otherwise herein provided, any lease issued under the provisions of this Act may be forfeited and canceled by an appropriate proceeding in the United States district court for the district in which the property, or some part thereof, is located whenever the lessee fails to comply with any of the provisions of this Act, of the lease, or of the general regulations promulgated under this Act and in force at the date of the lease; and the lease may provide for resort to appropriate methods for the settlement of disputes or for remedies for breach of specified conditions thereof. "Any lease issued after August 21, 1935, under the provisions of section 17 of this Act shall be subject to cancellation by the Secretary 956 [60 STAT.