Section 106
SEC. 106. If at any time after the approval of the application and before the issuance of a patent or the final concession of the land, or during the life of the lease, or at any time when the applicant or grantee still has obligations pending with the Government, in accordance with this Act, it appears that the land applied for is necessary, in the public interest, for the protection of any source of water or for any work for the public benefit that the Government wishes to undertake, the Secretary of Agriculture and Commerce may order the cancellation of the application or the non issuance of the patent or concession or the exclusion from the land applied for of such portion as may be required, upon payment of the value of the improvements, if any.