381.121.c.5 The terms ?e?enet weight?f?f or ?e?enet
wt.?f?f shall be used when stating the net
quantity of contents in terms of weight,
and the term ?e?enet contents?f?f or
?e?econtents?f?f when stating the net
quantity of contents in terms of fluid
measure. Except as provided in
?? 381.128, the statement shall be
expressed in terms of avoirdupois
weight or liquid measure. Where no
general consumer usage to the contrary
exists, the statement shall be in terms of liquid measure, if the product is liquid, or in terms of weight if the product is solid, semi-solid, viscous, or a mixture of solid and liquid. On packages containing less than 1 pound or 1 pint, the statement shall be expressed in ounces or fractions of a pint, respectively. On packages containing 1 pound or 1 pint or more, and less than 4 pounds or 1 gallon, the statement shall be expressed in ounces or in pounds with any remainder in terms of ounces or common or decimal fraction of the pound, or in the case of liquid measure, in the largest whole units with any remainder in terms of fluid ounces or common or decimal fraction of the pint or quart. For example, a declaration of three-fourths pound avoirdupois weight shall be expressed as "Net Wt. 12 oz."; a declaration of 1 1/2 pounds avoirdupois weight shall be expressed as "Net Wt. 24 oz.," "Net Wt. 1 lb. 8 oz.," "Net Wt. 1 1/2 lb.," or "Net Wt. 1.5 lbs.". However, on random weight packages the statement shall be expressed in terms of pounds and decimal fractions of the pound, for packages over 1 pound, and for packages which do not exceed 1 pound the statement may be in decimal fractions of the pound in lieu of ounces. The numbers may be written in provided the unit designation is printed. Paragraphs (c)(8) and (9) of this section permit certain exceptions to this paragraph (c)(5) for multi-unit packages, and random weight consumer size and small packages (less than 1/2 ounce), respectively.

381.121.c.6 The statement as it is shown on a label shall not be false or misleading and shall express an accurate statement of the quantity of contents of the container. Reasonable variations caused by loss or gain of moisture during the course of good distribution practices or by unavoidable deviations in good manufacturing practices will be recognized. Variations from stated quantity of contents shall be as provided in section 381.121b of this subchapter. The statement shall not include any term qualifying a unit of weight, measure, or count such as "jumbo quart," "full gallon," "giant quart," "when packed," "minimum," or words of similar importance except as provided in paragraph (b) of this section.