Pertinent to the provisions of Article 12 of the Act, an aircraft after being registered shall display on a conspicuous spot the nationality emblem of the Republic of China and its registration number (hereinafter referred as markings).
The nationality emblem of Republic of China’s civil aircraft shall be represented by the English letter “B” followed by a 5-digit Arabic numbers aligned left to right in the order shown below：
1) nationality emblem followed by a dash.
2) registration number follows the dash.
An aircraft after completing nationality registration will not have its markings altered, except in the case nationality has been deregistered and application for new nationality registration becomes necessary.

Markings for free balloons in globular shape should be painted on opposing sides of the maximum periphery, for those in semi-globular shape on both sides of the maximum periphery near the base, above the rope from which the gondola car is hung.

Markings for an airship should be painted on the ship’s portside and starboard with another on top of the ship equidistant to the bilateral markings.

The height of each letter of markings on free balloons and airship shall not be smaller than 50 centimeters.

The markings of aeroplane and helicopter shall be placed as the following：
1) For aeroplane:
(1) Wings. The markings shall be painted on the left half or extend to the right half of the lower surface of the wing structure, and equidistant to the front end and rear end of the wing, with top of the words uniformly facing the front end of the wing.
(2) Fuselage or tail surfaces. Markings on the fuselage shall be painted on the prominent position of each side of the fuselage between the wings and the tail surface. When located on a single vertical tail surface they shall appear on both sides. When located on multi-vertical tail surfaces they shall appear on the outboard sides of the outer surfaces.
2) For helicopters markings shall be painted on fuselage, tailboom or both sides of vertical tail surface structure solidly fixed.

The size of markings for aeroplane and helicopter is as following：
1)For aeroplane:
(1) Wing markings, the height of letter shall not be smaller than 50 centimeters.
(2) Markings for the Fuselage or tail, the height of letter shall not be smaller than 30 centimeters.
2)For helicopters markings on the fuselage, tailboom or vertical tail, the height of letter shall not be smaller than 30 centimeters.

Aircraft owner or operator, if unable to conform with the specifications in this Chapter in positioning the markings with the right size, shall report to CAA for approval to do otherwise.

The height of each letter and numeral should be equal, the width of each letter (except the the number 1) and the length of horizontal stroke should be two-third the height of letter. Space between letters should be one-fourth the width of letter, the dash is counted as a letter, the width of a stroke should be one-sixth the height of letter.

All strokes in the letter, numeral and dash should be solid lines, so colored as to sharply contrast the markings against the background.

Aircraft markings shall be kept clean and easily recognized at all times.

Aircraft operator shall report to CAA for record on any other words or picture he or she wishes to paint on the aircraft.