Rules of the Air Article 59
Authorization for VFR flights to operate above FL 290 shall not be granted in areas where a vertical separation minimum of 1000 ft is applied above FL 290.
中文原文 飛航規則第59條
高於飛航空層二九○且實施一千呎垂直隔離之區域，不得作目視飛航。
English translation for reference only; the Chinese text prevails. Not legal advice.