SEC. 9. Flying rules.—The following rules pertaining to air traffic shall be conformed to at all times by aircraft operating in the Philippine Islands:
Right-side traffic.—Aircraft flying in established civil airways, when it is safe and practicable, shall keep to the right side of each airway.
Giving-way order.—Aircraft shall give way to each other in the following order—
Airplanes.
Airships.
Balloons, fixed or free.
An airship not under control is classed as a free balloon. Aircraft required to give way shall keep a safe distance, having regard to the circumstances of the case. Three hundred feet will be considered a minimum safe distance.
Giving-way duties.—If the circumstances permit, the craft which is required to give way shall avoid crossing ahead of the other. The other craft may maintain its course and speed, but no engine-driven craft may pursue its course if it would come within three hundred feet of another craft, three hundred feet being the minimum distance within which aircraft other than military aircraft of the United States engaged in military maneuvers and commercial aircraft engaged in local industrial operations may come within proximity of each other in flight.
Crossing.—When two engine-driven aircraft are on crossing courses the aircraft which has the other on its right shall keep out of the way.
Approaching.—When two engine-driven aircraft are approaching head-on, or approximately so, and there is risk of collision, each shall alter its course to the right, so that each may pass on the left side of the other. This rule does not apply to cases where aircraft will, if each keeps on its respective course, pass more than three hundred feet from each other.
Overtaking.— (1) Definition. An overtaking aircraft is one approaching another directly from behind or within seventy degrees of that position, and no subsequent alteration of the bearing between the two shall make the overtaking aircraft a crossing aircraft within the meaning of these rules or relieve it of the duty of keeping clear of the overtaken craft until it is finally past and clear. (2) Presumption. In case of doubt as to whether it is forward or abaft such position, it should assume that it is an overtaking aircraft and keep out of the way. (3) Altering course. The overtaking aircraft shall keep out of the way of the overtaken aircraft by altering its own course to the right and not in the vertical plane.
Height over congested and other areas.—Exclusive of taking off from or landing on an established landing field, airport, or on property designated for that purpose by the owner, and except as otherwise permitted by section seven, aircraft shall not be flown:
Over the congested parts of cities, towns, or settlements, except at a height sufficient to permit of a reasonably safe emergency landing, which in no case shall be less than one thousand feet.
Elsewhere at a height less than five hundred feet, except where indispensable to an industrial flying operation.
Over certified high explosive danger areas except at a height sufficient to permit a reasonably safe emergency landing outside of the certified danger area, which in no case shall be less than one thousand feet.
Height over assembly of persons.—No flight under one thousand feet in height shall be made over any open-air assembly of persons except with the consent of the Secretary of Commerce and Communications. Such consent will be granted only for limited operations.
Acrobatic flying.—(1) Acrobatic flying means intentional maneuvers not necessary to air navigation.
(2) No person shall acrobatically fly an aircraft—
Over a congested area of any city, town or settlement.
Over any open-air assembly of persons or below two hundred feet in height over any established civil airway, or within one thousand feet horizontally thereof.
Any acrobatic maneuvers performed over any other place shall be concluded at a height greater than one thousand five hundred feet.
No person shall acrobatically fly any airplane carrying passengers for hire.
When performing acrobatic not prohibited by these regulations each person in the aircraft must be properly equipped with a parachute of a type and design which has been tested and approved by a competent agency of the United States Government or of the Government of the Philippine Islands.
Dropping objects or things.—When an aircraft is in flight the pilot shall not drop or release, or permit any person to drop or release, any object or thing except by permission of the Secretary of Commerce and Communications or when necessary to the personal safety of the pilot, passengers, or crew.
Seaplane on water.—Seaplanes on the water shall maneuver according to the laws and regulations of the United States governing the navigation of water craft, except as otherwise provided herein.
Transporting explosives.—The transporting of explosives other than that necessary for signaling or for fuel for such aircraft while in flight or materials for industrial and agricultural spraying (dusting) is prohibited, except upon special authority obtained from the Secretary of Commerce and Communications.
No person shall navigate aircraft while under the influence of, using, or having personal possession of intoxicating liquor, cocaine, or other habit-forming drugs.
The towing of aircraft by another aircraft is prohibited except by special permission of the Secretary of Commerce and Communications.
Parachute jumpers making exhibition, test, training, or demonstration jumps are required to wear an auxiliary parachute so arranged that it can be operated should the first parachute fail to function or become fouled.
The regulations heretofore issued prohibiting the flights, except under certain conditions, over the Islands of Corregidor and other fortified areas will remain in full force notwithstanding these regulations.