Section 4Sec./Art. 4

The grantee shall fix just and reasonable rates for the transportation of passengers, mail, freight, and property subject to the regulation and approval of the Civil Aeronautics Board or such other regulatory agencies as the government may designate for this purpose. Any order of the Civil Aeronautics Board made under this section shall be subject to review by the courts.

All aircraft used by the grantee and the flight crew members operating such aircraft shall be licensed by the government of the Philippines.

The grantee's aircraft, together with their accessories and equipment, shall at all times be in airworthy condition. They shall be equipped with radio communication, safety and other equipment, and shall be operated and maintained in accordance with the regulations and technical requirements of the Air Transportation Office or such other regulatory bodies as the government may prescribe for this purpose.

The grantee's equipment and the operation thereof shall at all times be subject to inspection and regulation by the Air Transportation Office whose decisions on technical matters shall be binding until revoked or annulled by superior authority under whose control this office falls or by the courts for excess or abuse of jurisdiction.

The grantee shall comply with the provisions of Republic Act Numbered Seven hundred and seventy-six, as amended, and the regulations promulgated thereunder.