Whenever a commodity in package form is advertised in any manner and the retail price of the package is stated in the advertisement, there shall be closely and conspicuously associated with such statement of price a declaration of the basic quantity of contents of the package as is required by law or regulation to appear on the package; provided in connection with the declaration required under this section there shall be declared neither the qualifying term “when packed” nor any other words of similar import, nor such terms qualifying a unit of weight, measure or count as “jumbo”, “giant”, “full” and the like, that tend to exaggerate the amount of commodity in the package.