; (4) sharing costs to create defensible space for a distance of not less than 100 feet around a residence that was built before the date of enactment of this Act; and (5) planning and implementing cross-boundary hazardous fuels reduction projects as identified in a community wildfire protection plan. (c) Authorization of appropriations There is authorized to be appropriated $100,000,000 to carry out this section for each fiscal year. 8. Accelerated restoration program for ponderosa pine forests (a) Definitions In this section: (1) Average severe fire weather With respect to a unit of Federal land, the term average severe fire weather means the 90th percentile of atmospheric and fuel conditions under which wildfires would burn in that unit in a given year. (2) Federal land The term Federal land means— (A) public lands (as defined in section 103 of the Federal Land Policy and Management Act of 1976 ( 43 U.S.C. 1702 )); (B) land held in trust for Indian tribes; or (C) National Forest System land. (3) Hazardous fuel reduction The term hazardous fuel reduction means the removal or modification of flammable vegetation or woody debris through prescribed fire, thinning, brush removal, mastication, pruning, slash treatment, or a combination of those methods, on the condition that the method is ecologically appropriate, cost-effective, and selected on a site-specific basis. (4) Pilot program The term pilot program means the pilot program established under subsection (b)(1). (b) Pilot program Subject to the availability of appropriations, the Secretaries shall— (1) establish a pilot program to reduce the risk of wildfires to communities in the wildland-urban interface and reestablish natural fire regimes outside the wildland-urban interface