N.Y. Comp. Codes R. & Regs. tit. 1, § 118.4
(a) Unit of certification.
A seed field shall be considered the unit of certification. A strip of ground at least five feet in width and which is mowed, uncropped or planted to some crop other than flatpea shall constitute a field boundary.
(b) Isolation.
To be eligible for the production of foundation or certified seed, a seed field shall be isolated from other strains of Lathyrus sylvestris L. or other species of Lathyris or Vicia in accordance with requirements given in the following table:
| (Minimum isolation distance required) | ||
|---|---|---|
| Foundation | Certified | |
| Flatpea | 40 rods | 20 rods |