All commercial laundries, performing, selling, or offering for sale, laundry service on the basis of weight, shall have legal scales of approved type and design, properly tested and sealed.
N.J. Stat. Ann. § 51:1-34
Tested scales
Current official text: New Jersey Legislature. Digitized from the New Jersey Legislature bulk statutes download. Reproduced from public-domain New Jersey statutes; confirm against the official source for the current text. Not legal advice.