量處輕重儀 2.66

2.66

右準斷𣰽𣯫成三衣相量者，如前入輕，若至中土，便從重攝。皮三衣者，準上可知。厚大者，入重，餘並不斷。義約云，既不許服用，便成體重所收，然以開於俗家邊地受用，未是通遮，故入事重中。伊梨三皮律不斷者，明是重攝。

The above is determined by analogy: rugs that have the form and measure of the three robes enter light property as before; but if brought to the Central Land, they are subsumed under heavy property. Leather three robes can be understood by analogy with the above. Thick and large ones enter heavy property, while the rest are not strictly ruled out. The reasoning states: since wearing them is not permitted, they are gathered as intrinsically heavy; however, because their use was permitted for lay households and in borderlands, this is not a universal prohibition, so they enter functionally heavy property. That the Vinaya does not prohibit the three skins of yili clearly indicates they are subsumed under heavy property.