Sec. 551. Declaration of policy. 552. Definitions. 553. Duties of Secretary; surveys, research, etc.; proj­ects. 554. Lands subject to chapter. 555. Conditions precedent for aid to non-Federal lands. (a) Enactment of local laws; agreements. (b) Contributions. 556. Administration. (a) Employment of personnel. (b) Employment of equipment. (c) Contractual authority. (d) Acquisition of lands, etc. (e) Property restoration. (f) Contributions; cooperation with other agencies; disposition of moneys. 557. Rules and regulations. 558. Authorization of appropriations.