16 CFR § 501.3 - Replacement bags for vacuum cleaners.
Replacement bags for vacuum cleaners, packaged and labeled for retail sale are exempt from the requirements of § 500.15a of this chapter which specifies how measurement of container type commodities should be expressed, provided:
(a) The quantity of contents is expressed in terms of numerical count of the bags;
(b) A statement appears on the principal display panel of the package accurately identifying the make and model of the vacuum cleaner or cleaners in which the replacement bag is intended to effectively function;
(c) The name and place of business of the manufacturer, packer, or distributor of the replacement bags, in addition to the requirements of § 500.5 of this chapter, appears on the principal display panel of the package.