N.Y. Comp. Codes R. & Regs. tit. 1, § 106.2 – Restrictions applying to the production of foundation seed.

(1) Plantings shall be on land not used for potatoes the previous year.
(2) Seed grown on farms where bacterial ring rot is found during the current or previous season is not eligible for designation as Foundation-Uihlein Generation 1.
(b) Foundation-Uihlein Generations 2 and 3.
(1) Plantings shall be on land which was not used for potatoes the previous year. However, plantings may be made on the same field for two consecutive years, provided that seed of the same variety which meets foundation requirements is produced in both years and is approved by the certifying agency.
(2) Seed grown on farms where bacterial ring rot is found during the current or previous season is not eligible for designation as Foundation Generation 2 or 3.
(c) Foundation Generations 4 through 6.
(1) Plantings shall be on land not used for potatoes the previous year. However, plantings may be made on the same field for two consecutive years, provided seed of the same variety meeting foundation requirements is produced in both years and is approved by the certifying agency.
(2) Seed grown on farms where bacterial ring rot is found during the current season is not eligible for designation as Foundation.

(a) Foundation-Uihlein Generation 1.