Section 2
Sec. 2. Section thirty-four of the same Act is amended to read as follows: "Sec. 34. Eligibility for registration.—Except as otherwise provided in the Constitution and existing treaty or treaties, no aircraft shall be eligible for registration unless it is owned by or leased to a citizen or citizens of the Philippines and is not registered under the laws of any foreign country. "Such certificate shall be conclusive evidence of nationality for international purposes, but not in any proceedings under the laws of the Republic of the Philippines. "The certificate of registration is conclusive evidence of ownership, except in a proceeding where such ownership is in issue or when the aircraft is only under lease,"