It is forbidden for a lower-ranking samurai in kachu (family-related communities which existed in the late Muromachi and Azuchi-Momoyama periods) to wear clothes embroidered with ayara (twill weave, pattern of diagonal stripes) or nishiki (brocade) because there has been no precedent of this.
諸家中ニ至リ郎従・諸卒ノ綾羅錦繍ノ飾服ハ古法ニ非ズ、制禁セシムル事。