EXECUTIVE ORDER NO. 306

: The purpose is to establish and classify airports and landing fields in the Philippines, fixing responsibilities for their construction, administration, use, and maintenance.
: National airports and landing fields are classified into commercial airports (for commercial aviation) and military airports (for military aviation).
: The Director of Aeronautics has control and supervision over commercial national airports and landing fields.
: These are landing fields constructed along air routes as safety precautions for forced landings.
: Airports and landing fields that are financed exclusively from provincial funds and are mainly of local importance.
: Yes, municipal airports may be designated as national airports upon the request of the concerned municipality and with the favorable recommendation of the Secretary of National Defense.
: They must be constructed and rated according to the regulations of the Bureau of Aeronautics and have a permit issued by that Bureau, except in cases of emergency.
: The Chief of Staff of the Philippine Army supervises military national airports and landing fields, but supervision can be delegated to the Director of Aeronautics upon request and approval by the Secretary of National Defense.
: The Secretary may designate municipal airports as provincial airports and approve rules and regulations for the use of airports except those for purely military purposes.
: It took effect on October 1, 1940.