(a) Net contents shall be stated as follows:

(1) If less than 1 pint, in fluid ounces, or fractions of a pint.

(2) If 1 pint, 1 quart, or 1 gallon, the net contents shall be so stated.

(3) If more than 1 pint, but less than 1 quart, the net contents shall be stated in fractions of a quart, or in pints and fluid ounces.

(4) If more than 1 quart, but less than 1 gallon, the net contents shall be stated in fractions of a gallon, or in quarts, pints, and fluid ounces.

(5) If more than 1 gallon, the net contents shall be stated in gallons and fractions thereof.

(b) All fractions shall be expressed in their lowest denominations.

(c) The net contents need not be stated on any label if the net contents are displayed by having the same blown, branded, or burned in the container in letters or figures in such manner as to be plainly legible under ordinary circumstances and such statement is not obscured in any manner in whole or in part.