Subchapter II. Investigations, Experiments, and Tests Affecting Reforestation and Forest Products 16 U.S. Code §581i-1. Advance of funds for cooperative research 16 U.S. Code §581j. Congressional declaration of policy on reforestation and revegetation 16 U.S. Code §581k. Authorization of appropriations for reforestation and revegetation 16 U.S. Code §582. Puerto Rico; application of forest protection laws