This verse is a summary statement regarding the instructions about mildew on clothing. The word law should probably be translated as a plural in many languages, since there are a number of different regulations involved. New International Version reads “These are the regulations,” while New Jerusalem Bible has “This is the procedure.” See 6.8 and 11.46-47.

To decide whether it is clean or unclean: this element was omitted in earlier editions of Good News Translation but is now included in “this is how … unclean.” It may be rendered in a separate sentence saying “These regulations allow you [Israelites] to determine whether these things are clean or unclean.”

Quoted with permission from Péter-Contesse, René and Ellington, John. A Handbook on Leviticus. (UBS Helps for Translators). New York: UBS, 1990. For this and other handbooks for translators see here .