Memorandum Circular Title Downloadable
1. Revised Rules on Regulations on Prevention, Containment, Abatement and Control of Oil Marine Pollution and Providing Penalties Thereof  
2. Revised Rules and Regulations on the Issuance of International Oil Pollution Prevention (IOPPC) and Oil Pollution Prevention Certificate 
3. Guidelines for the Accreditation of MARPOL Surveying Organizational / Entities 
4. Rules and Regulations on the Prevention of Pollution from Offshore Petroleum Exploration, Development and Production Operations