### Question
How does the law define area of the principal display panel?


### Answer
Under *21 CFR § 101.1*, **area of the principal display panel** is defined as:

> 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;

#### Citation:
  - *21 CFR § 101.1*
  - Heading: **PART 101—FOOD LABELING > Subpart A—General Provisions**

