Land that is part of the Guam Forest System shall not be sold. Such land, however, may be leased to other entities pursuant to § 63504(l) supra, provided that leased land shall be used only for the following purposes: (a) recreation, excluding activities that are detrimental to the environment, such as off-roading; (b) education; (c) training for the Department of Agriculture Forestry and Soil Resources Division or other related activities; or (d) protection and preservation of natural resources and historic artifacts. Any use inconsistent with this Act shall be considered a violation of law, and offenders will be subject to penalties, as prescribed by the Department.