1. Isolation. Prior to inspection, a field must be isolated from inseparable crops by a fence row, natural boundary, or by a strip at least five feet [1.52 meters] wide which is either mowed, sprayed, or uncropped.

Factor	Foundation	Maximum Tolerance
		Registered	Certified
Other varieties *	0.1 percent	0.2 percent	0.2 percent
Corn and sunflower plants bearing seed	none	none	none
Prohibited noxious weeds **	none	none	none
Objectionable weeds ***	none	none	none

*Other varieties include plants that can be differentiated from the variety being inspected, but shall not include variants characteristic of the variety.

The tolerance for prohibited or objectionable weeds, or both, in the field will be determined by the inspector.

*Objectionable weeds include nightshade species and cocklebur.

History: Amended effective May 1, 1986; August 1, 1991; September 1, 2002; January 2, 2006; July 1, 2010.

General Authority: NDCC 4.1-52-10

Law Implemented: NDCC 4.1-52-10, 4.1-53-42