New York Codes, Rules and Regulations
Title 1 - DEPARTMENT OF AGRICULTURE AND MARKETS
Chapter III - Plant Industry
Subchapter A - Inspection and Sale of Seeds (Article 9, Agriculture and Markets Law)
Part 100 - Elementary and Secondary Education School Program
Section 100.2 - Land requirements

(a) Breeder seed for the production of foundation seed shall be planted on land on which no seed of the same species has grown or been planted during the previous five years. Land must be free from volunteer plants.

(b) Foundation or registered seed for the production of registered or certified seed respectively shall be planted on land on which no seed of the same species has grown or been planted during the previous year, except for foundation, registered, or certified seed of the same strain. The land shall be free from volunteer plants.