Republic Acts
Laws (RA's) created by the Congress and signed by the President.

Administrative Orders
Prescribed policies, rules, and regulations and procedures (AO's) individuals and organizations outside of the DOH.

Department Memorandum
Issuances that deals usually with guidelines/reminders of action and obligations of all or group of offices within the Department .

Executive Orders
Executive legislations (EO's) that are health-related.

Presidential Decrees
Executive decrees (PD's) that are health-related.