I am grateful that my calligraphy teacher, Mei-Chu Chang 張梅駒, was generous enough to write this for me recently. My parents are having these characters carved into wood by a Taiwanese artisan so it can hang beautifully on a wall.
It reads Dào Dé Gōng Fǎ 道德功法 in a distinctive clerical script (lì shū 隸書) and signed zǐ lóng 子龍 with running script (xíng shū 行書), which is his art name (hào 號).