Rules of the Air Article 64
When operated within classes B, C, D airspace and class E surface airspace, an aircraft may request, after authorized by appropriate air traffic control unit, to operate as a special VFR flight:1. Aerodrome weather conditions below VMC and the ceiling not less than 500 ft and ground visibility not less than 1,500 m.2. When aerodrome weather report not available and the pilot reports a flight visibility not less than 1,500 m.The aircraft operated as a special VFR flight shall keep clear of clouds and in sight of the ground or water, and shall maintain flight visibility not less than 1,500 m.During the night, unless the aircraft is capable of instrument flying, and is conducting training flight in the traffic pattern, the aircraft shall not request for a special VFR flight.
中文原文 飛航規則第64條
航空器於B類、C類、D類空域及E類地表空域有下列情形之一者，得申請特種目視飛航，並經航管單位許可後實施：
一、機場之天氣情況低於目視飛航天氣最低標準，而雲幕高五百呎以上且地面能見度一千五百公尺以上時。
二、機場無氣象報告，而駕駛員報告飛航能見度一千五百公尺以上時。
特種目視飛航航空器應保持不進雲及能目視地面或水面，並應保持一千五百公尺以上之飛航能見度。
在夜間，除航空器具儀器飛航能力，且係實施機場航線訓練外，不得申請特種目視飛航。
一、機場之天氣情況低於目視飛航天氣最低標準，而雲幕高五百呎以上且地面能見度一千五百公尺以上時。
二、機場無氣象報告，而駕駛員報告飛航能見度一千五百公尺以上時。
特種目視飛航航空器應保持不進雲及能目視地面或水面，並應保持一千五百公尺以上之飛航能見度。
在夜間，除航空器具儀器飛航能力，且係實施機場航線訓練外，不得申請特種目視飛航。