Regulations of Aircraft Registration Article 24
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.
中文原文 航空器登記規則第24條
飛艇之標誌，應漆於最大水平斷面之兩側及於兩側標誌等距離之頂面。