1. (1) The area, density, stage of maturity and location of any contaminating pollen source is an important factor in cross pollinations, and therefore must be noted on the seed crop inspection report for consideration in determining certification status. There shall not be any Cannabis sativa L. plants within 100m (328.08 feet) of the crop and not more than ten plants/ha beyond 100m within the isolation requirement.

2. (2) The required isolation must be present prior to flowering and crop inspection.

   Table 1: Minimum Isolation Distances Required Between Inspected Hemp and Other Crops

   Inspected Crop	Other Crops	Isolation Distance Required (feet)
   Dioecious type –Foundation	- Different varieties of hemp- Noncertified crop of hemp	15,748
   - Lower certified class seed crop of same variety	6,460
   - Same class of certified seed crop of same variety	10
   Dioecious type –Registered	- Different varieties of hemp- Noncertified crop of hemp	15,748
   - Seed crop of same variety that meets certified standards for varietal purity	5,249
   - Seed crop of same variety that meets registered standards for varietal purity	3
   Dioecious type –Certified	- Different varieties of hemp- Noncertified hemp	2,624
   - Planted with certified seed of the same variety that meets certified standards for varietal purity	656
   - Seed crop of same variety that meets certified standards for varietal purity	3
   Monoecious type –Foundation	- Dioecious variety of hemp- Noncertified crop of hemp	15,748
   - Other monoecious varieties- Lower certified class seed crop of same variety	9,690
   - Same class of certified seed of same variety	16
   Monoecious type –Registered	- Dioecious variety of hemp- Noncertified crop of hemp	15,748
   - Different varieties of the same type of hemp (monoecious or female hybrid)	6,460
   - Seed crop of same variety that meets certified standards for varietal purity	3,230
   - Seed crop of same variety that meets registered standards for varietal purity	3
   Monoecious type –Certified	- Dioecious variety of hemp- Noncertified crop of hemp	3,230
   - Different varieties of the same type of hemp (monoecious or female hybrid)- Planted with certified seed of the same variety that meets certified standards for varietal purity	656
   - Seed crop of same variety that meets certified standards for varietal purity	3

[Statutory Authority: RCW 15.49.005, [15.49].021, [15.49].310, [15.49].370, and 15.140.030. WSR 21-20-101, § 16-302-855, filed 10/4/21, effective 11/4/21. Statutory Authority: RCW 15.120.030(3), 15.49.021, 15.49.310, and chapter 34.05 RCW. WSR 17-08-090, § 16-302-855, filed 4/5/17, effective 5/6/17.]