Wash. Admin. Code § 16-302-540
Field tolerances for the production of white clover or trefoil seed are as follows:
| Maximum permitted: Ratio of Plant FieldProducing* | |||
| Factor | Foundation | Registered | Certified |
| Other Variety | 1:1000 | 1:400 | 1:100 |
| Sweet Clover | 1:1000 | 1:400 | 1:100 |
| Other Inseparable Crops | 1:1000 | 1:400 | 1:100 |
| * | Prohibited noxious weeds must be controlled to prevent seed formation. |
[Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3) and chapter 17.24 RCW. WSR 00-24-077, § 16-302-540, filed 12/4/00, effective 1/4/01.]