N.Y. Comp. Codes R. & Regs. tit. 1, § 189.4 – Branding.

(a) Each closed package of lettuce when sold, exposed for sale or transported for sale shall be plainly and conspicuously marked to show:
1. (1) That such lettuce is “cull lettuce,” if such is the fact.
2. (2) The number of heads of lettuce contained therein.
3. (3) That the package was vacuum-cooled, if such is the fact.
4. (4) The name and address of the packer or repacker.
  The cull identification requirement of paragraph (1) of this Subpart shall not apply to closed packages of lettuce which are being held for sale at retail in the retailer's own storage facilities or which are being transported from such storage facilities to stores operated by such retailer.
(b) All markings shall be clear and legible, the height of letters or numbers indicating the grade, number of heads, and whether vacuum-cooled shall be at least equal in height to all other required markings.
(c) For packages containing more than 10 heads of lettuce all markings shall be in letters or numbers not less than one inch in height.
(d) For packages containing 10 heads or less, all markings shall be in letters or numbers at least one-eighth inch in height.
(e) All marks or labels designating the grade of lettuce shall be clear and legible, plainly printed, stenciled or stamped. Labels in connection with transparent film type packages shall, if inserted, be placed face out in a conspicuous manner and position.
(f) All required markings on tags shall be at least five-eighths inches in height except for marking “culls”.