Amendments made to the principal Act concern its application sphere, compulsory land acquisition, incentives for aquaculture projects, conversion of agricultural land into fish ponds and prawn farms, protection of mangrove areas, and change of crops.

This Act makes provision for the protection of the environment of a broad sense. Its provisions are divided into Titles, the major part of them dealing with specific aspects of environment protection.Title I makes provision with respect to air and noise pollution.Purpose Title II to prescribe management guidelines aimed to protect and improve the quality of Philippine water resources.

This Code establishes the system and defines powers of provincial, city, municipal and barangay governments in the Philippines.

This Act lays down the basic principles of forest management and conservation, makes provision for the administration of forestry (Chap. I), the survey and classification of lands for purposes of forestry (Chap. II), and the use of forest resources (Chap. III).Basic policy principles are outlined in section 2. Section 3 contains definitions.

This Administrative Order, consisting of 5 sections, makes Local Government Units, particularly Provinces to adopt in planning activities the Guidelines for mainstreaming Disaster Risk Reduction (DRR) in Subnational Development and Land Use/Physical Planning.