Regulations of Aircraft Registration Article 23
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.
中文原文 航空器登記規則第23條
自由氣球之標誌，圓形者，應漆於最大水平圓周相對之兩側面。
面圓形者，應漆於最大水平斷面之兩側，連接繫籃繩索處之上緣。
面圓形者，應漆於最大水平斷面之兩側，連接繫籃繩索處之上緣。