C.F.R. » Title 21 » CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES › SUBCHAPTER B—FOOD FOR HUMAN CONSUMPTION › PART 101—FOOD LABELING › Subpart A—General Provisions

21 C.F.R. § 101.1

Principal display panel of package form food

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The term principal display panel as it applies to food in package form and as used in this part, means the part of a label that is most likely to be displayed, presented, shown, or examined under customary conditions of display for retail sale. The principal display panel shall be large enough to accommodate all the mandatory label information required to be placed thereon by this part with clarity and conspicuousness and without obscuring design, vignettes, or crowding. Where packages bear alternate principal display panels, information required to be placed on the principal display panel shall be duplicated on each principal display panel. For the purpose of obtaining uniform type size in declaring the quantity of contents for all packages of substantially the same size, the term area of the principal display panel means the area of the side or surface that bears the principal display panel, which area shall be:

(a) In the case of a rectangular package where one entire side properly can be considered to be the principal display panel side, the product of the height times the width of that side;

(b) In the case of a cylindrical or nearly cylindrical container, 40 percent of the product of the height of the container times the circumference;

(c) In the case of any otherwise shaped container, 40 percent of the total surface of the container: Provided, however, That where such container presents an obvious “principal display panel” such as the top of a triangular or circular package of cheese, the area shall consist of the entire top surface. In determining the area of the principal display panel, exclude tops, bottoms, flanges at tops and bottoms of cans, and shoulders and necks of bottles or jars. In the case of cylindrical or nearly cylindrical containers, information required by this part to appear on the principal display panel shall appear within that 40 percent of the circumference which is most likely to be displayed, presented, shown, or examined under customary conditions of display for retail sale.

Notes of Decisions
Cited in 13 cases (3 in the last 5 years), 1999–2025 · leading case: Nagel v. Twin Labs., Inc., 2003 Cal. Daily Op. Serv. 4354 (Cal. Ct. App. 2003).
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Nagel v. Twin Labs., Inc., 2003 Cal. Daily Op. Serv. 4354 (Cal. Ct. App. 2003). “) nor the FDA regulations promulgated thereunder ( 21 C.F.R. § 101.1 et seq. (2002)) define “standardized” at all.”
Nagel v. Twin Labs., Inc., 134 Cal. Rptr. 2d 420 (Cal. Ct. App. 2003). “) nor the FDA regulations promulgated thereunder ( 21 C.F.R. § 101.1 et seq.) define "standardized" at all.”
Lockwood v. Conagra Foods, Inc., 597 F. Supp. 2d 1028 (N.D. Cal. 2009). “THE FEDERAL REGULATORY SCHEME The Federal Food, Drug, and Cosmetic Act (“FDCA”) gives the FDA the responsibility to protect the public health by ensuring that “foods are safe, wholesome, sanitary, and properly labeled,” 21 U.”
Lam v. Gen. Mills, Inc., 859 F. Supp. 2d 1097 (N.D. Cal. 2012). “See 21 C.F.R. § 101.1 et seq. In 1990, Congress amended the FDCA by enacting the NLEA.”
Salazar v. Honest Tea, Inc., 74 F. Supp. 3d 1304 (E.D. Cal. 2014). “, 21 C.F.R. § 101.1 et. seq. In 1990, Congress passed an amendment to the FDCA, the Nutrition Labeling and Education Act (“NLEA”), establishing new requirements governing nutritional content labeling.”
Katie Kane v. Chobani, LLC, 645 F. App'x 593 (9th Cir. 2016). “2008)); see also 21 C.F.R. § 101.1 et seq., 131.200(d)(2), 168.”
Ivie v. Kraft Foods Global, Inc., 961 F. Supp. 2d 1033 (N.D. Cal. 2013). ““The [FDCA] gives the [United States Food and Drug Administration (“FDA”) ] the responsibility to protect the public health by ensuring that ‘foods are safe, wholesome, sanitary, and properly labeled,’ 21 U.”
Jackson-Mau v. Walgreen Co., 115 F.4th 121 (2d Cir. 2024). “21 C.F.R. § 101.1 (g)(2). Jackson-Mau acknowledges that, ordinarily, the FDA allows dietary supplement manufacturers to rely on 18 methods in these compendia to identify ingredients on labels, and she does not dispute that each compendium contains definitions of and identity…”
PepsiCo, Inc. v. Reyes, 70 F. Supp. 2d 1057 (C.D. Cal. 1999). “21 C.F.R. § 101.1 - 101.108; Cal.Code Regs.”
Brod v. Sioux Honey Ass'n, Coop., 895 F. Supp. 2d 972 (N.D. Cal. 2012). “, 21 C.F.R. § 101.1 et seq. The FDA promulgated 21 C.”
Stansfield v. Minute Maid Co., 124 F. Supp. 3d 1226 (N.D. Fla. 2015). “” See 21 C.F.R. § 101.1 . The back has an “information panel.”
Zurliene v. Dreyers Grand Ice Cream, Inc. (S.D. Ill. 2022). “” 21 C.F.R. §§ 101.1 & 101.2(a). Thus, the FDA regulations require Defendant to list the ingredients of milk chocolate and vegetable fat coating (specifically, coconut oil) either on the front of the package or on the side of the package where the ingredients are normally listed.”
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