In order to allow the variations incident to proper grading and handling in each of the foregoing grades, the following tolerances are provided as specified:

U.S. No. 1—(1) For shell defects, by count. (i) 5 percent for pecans with damaged shells, including therein not more than 2 percent for shells which are seriously damaged.

For kernel defects, by count. (i) 12 percent for pecans with kernels which fail to meet the requirements for the grade or any specified color classification, including therein not more than 7 percent for kernels which are seriously damaged: Provided, That not more than six-sevenths of this amount, or 6 percent, shall be allowed for kernels which are rancid, moldy, decayed or injured by insects: And provided further, That included in this 6 percent tolerance not more than one-half of one percent shall be allowed for pecans with live insects inside the shell.

In addition, 8 percent for kernels which fail to meet the color requirements for the grade or for any specified color classification, but which are not seriously damaged by dark discoloration of the skin: Provided, That these kernels meet the requirements for the grade other than for skin color.

For loose extraneous or foreign material, by weight. (i) 0.5 percent (one-half of 1 percent).

U.S. No. 2—(1) For shell defects, by count. (i) 10 percent for pecans with damaged shells, including therein not more than 3 percent for shells which are seriously damaged.

For kernel defects, by count. (i) 30 percent for pecans with kernels which fail to meet the requirements of the U.S. No. 1 grade, including therein not more than 10 percent for pecans with kernels which are seriously damaged: Provided, That not more than seven-tenths of this amount, or 7 percent, shall be allowed for kernels which are rancid, moldy, decayed or injured by insects: And provided further, That included in this 7 percent tolerance not more than one-half of one percent shall be allowed for pecans with live insects inside the shell.

For loose extraneous or foreign material, by weight. (i) 0.5 percent (one-half of 1 percent).