Section 2
SEC. 2. Any person, partnership, association or corporation, contractor and subcontractor, granted and enjoying any tax exemption, subsidy or incentive from the Government, or with an outstanding loan from or whose existing obligation is guaranteed by the Government or by any Government owned or controlled corporation and financial institution, or awarded any contract by the Government or any of its agencies and instrumentalities, requiring any transportation of persons and property by air or water between the Philippines and a place outside thereof or between two places both of which are outside the Philippines, the payment for which is made directly or indirectly from the funds of such person, partnership, association, corporation, contractor or subcontractor, shall cause such air or water transportation to be provided by the Philippine flag air carrier or shipping lines to the maximum extent service by such air carrier or shipping lines is available: Provided, That, any such person, partnership, association, corporation, contractor or subcontractor may procure the services of foreign air carriers or shipping lines to the extent that services by the Philippine flag air carrier or shipping lines is not available, only upon prior certification by the Civil Aeronautics Board or by the Board of Transportation, as the case may be.