Sec. 571. Declaration of policy. 572. United States contributions to Pennsylvania: authority, conditions, limitations. (a) Contributions to be matched by Commonwealth. (b) Amount of contributions authorized. (c) Limitation on use of contribution. (d) Commonwealth responsible for installation and operation of projects. (e) Location and operation of projects. (f) Economic justification for abandoned coal mine projects. 573. Statement by Commonwealth for Secretary. 574. Hearings; withholding payments. 575. Repealed. 576. Authorization of appropriations.