To allow for variations incident to proper grading and handling in each of the foregoing grades, the following tolerances by weight or equivalent basis, are provided as specified.

For defects—(1) U.S. No. 1. (i) At Shipping Point: A total of 8 percent for potatoes in any lot which fail to meet the requirements for the grade: Provided, That included in this tolerance not more than the following percentages shall be allowed for the defects listed:

5 percent for external defects;

5 percent for internal defects; and

Not more than a total of 1 percent for potatoes which are frozen or affected by soft rot or wet breakdown. See § 51.1547.

En route or at destination: A total of 10 percent for potatoes in any lot which fail to meet the requirements for the grade: Provided, That included in this tolerance not more than a total of 8 percent shall be allowed for permanent defects: And provided further, the following percentages shall be allowed for the defects listed:

7 percent for external defects, including therein not more than 5 percent for permanent external defects;

7 percent for internal defects, including therein not more than 5 percent for permanent internal defects; and

Not more than a total of 2 percent for potatoes which are frozen or affected by soft rot or wet breakdown. See § 51.1547.

U.S. Commercial: A total of 20 percent for potatoes in any lot which fail to meet the requirements for the grade: Provided, That included in this tolerance not more than the following percentages shall be allowed for the defects listed:

10 percent for potatoes which fail to meet the requirements for U.S. No. 2 grade, including therein not more than:

6 percent for external defects;

6 percent for internal defects; and

Not more than a total of 1 percent for potatoes which are frozen or affected by soft rot or wet breakdown. See § 51.1547.

U.S. No. 2. (i) At Shipping Point: A total of 10 percent for potatoes in any lot which fail to meet the requirements for the grade: Provided, That included in this tolerance not more than the following percentages shall be allowed for the defects listed:

6 percent for external defects;

6 percent for internal defects; and

Not more than a total of 1 percent for potatoes which are frozen or affected by soft rot or wet breakdown. See § 51.1547.

En route or at destination: A total of 12 percent for potatoes in any lot which fail to meet the requirements for the grade: Provided, That included in this tolerance not more than a total of 10 percent shall be allowed for permanent defects: And provided further, the following percentages shall be allowed for the defects listed:

8 percent for external defects, including therein not more than 6 percent for permanent external defects;

8 percent for internal defects, including therein not more than 6 percent for permanent internal defects; and

Not more than a total of 2 percent for potatoes which are frozen or affected by soft rot or wet breakdown. See § 51.1547.

For off-size. (1) Not more than 3 percent of the potatoes in any lot may be smaller than the required or specified minimum size except that a tolerance of 5 percent shall be allowed for potatoes packed to meet a minimum size of 21/4 inches or larger in diameter or 5 ounces or more in weight. In addition, not more than 10 percent may be larger than any required or specified maximum size. See § 51.1547.

When a percentage of the potatoes is specified to be of a certain size and larger, individual samples shall have not less than one-half of the percentage specified: Provided, That the average for the entire lot is not less than the percentage specified.