[Code of Federal Regulations]
[Title 21, Volume 2]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR101.1]

[Page 11]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 101_FOOD LABELING--Table of Contents
 
                      Subpart A_General Provisions
 
Sec.  101.1  Principal display panel of package form food.


    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.