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 105 - Tomato Seed Certification Standards
Section 105.2 - Field requirements

(a) The term field as used herein applies to the area occupied by one variety of tomatoes planted or handled as a continuous operation which is covered by one inspection report. A portion of a field will not be accepted for inspection. Varieties must be separated by at least 30 feet.

(b) Certification may be denied to any field within 30 feet of a field where tomatoes were grown the previous year.

(c) Evidence of poor cultural care, or poor and uneven growth, or a serious injury by insects, or other conditions which make accurate inspection impossible will disqualify a field.