Section 13. System of Land Classification. —

The Department Head shall study, devise, determine and prescribe the criteria, guidelines and methods for the proper and accurate classification and survey of all lands of the public domain into agricultural, industrial or commercial, residential, resettlement, mineral, timber or forest, and grazing lands, and into such other classes as now or may hereafter be provided by law, rules and regulations.

In the meantime, the Department Head shall simplify through inter-bureau action the present system of determining which of the unclassified lands of the public domain are needed for forest purposes and declare them as permanent forest to form part of the forest reserves. He shall declare those classified and determined not to be needed for forest purposes as alienable and disposable lands, the administrative jurisdiction and management of which shall be transferred to the Bureau of Lands: Provided, That mangrove and other swamps not needed for shore protection and suitable for fishpond purposes shall be released to, and be placed under the administrative jurisdiction and management of, the Bureau of Fisheries and Aquatic Resources. Those still to be classified under the Present system shall continue to remain as part of the public forest.