The Enforcement Rules of the Specifically Selected Goods and Services Tax Act<br> Article 3
"Airplanes, helicopters, and ultra-light vehicles," as used in Article 2, paragraph 1, subparagraph 4 of the Act, means airplanes, helicopters, or ultra-light vehicles as defined in Article 2, subparagraphs 20, 24, and 25 of the Civil Aviation Act.