The requirements for Washington C grade green or yellow variety apples include the conditions for Washington fancy grade apples under WAC 16-403-054. In addition, apples of this grade must be free from excessive damage caused by russeting as defined under the definitions of "damage by russeting," in WAC 16-403-164(2) under the following conditions:

(1) The aggregate area of an apple which is covered by smooth net-like russeting may not exceed twenty-five percent.

(2) The aggregate area of an apple which is covered by smooth solid russeting may not exceed ten percent except as follows:

(a) The aggregate area for Newtown, Granny Smith or similar varieties which is covered with smooth solid russeting may not exceed twenty percent; and

(b) The aggregate area of an apple which is covered with excessively rough or bark-like russeting or limb rubs may not exceed the area of a circle three-fourths inch in diameter. 

(3) There is no requirement in this grade pertaining to invisible water core.