N.Y. Comp. Codes R. & Regs. tit. 1, § 57.12 – Requirements for producers.

(1) Birds shall originate in parent flocks which meet the requirements of section 57.10 of this Part, shall be raised according to the requirements specified in section 57.11 of this Part and shall have been tested as required therein and found negative for Salmonella enteritidis.
(2) Within 60 days prior to the placement of new birds in a house, environmental samples shall be collected and tested as provided in section 57.8(b) of this Part. No birds shall be placed in the house until the test results are known to be negative for Salmonella enteritidis.
(b) Requirements for producers utilizing continuous management (multiage flocks), for commercial egg producing poultry flocks.
(1) Birds shall originate in parent flocks which meet the requirements of section 57.10 of this Part, shall be raised according to the requirements specified in section 57.11 of this Part and shall have been tested as required therein and found negative for Salmonella enteritidis.
(2) Environmental samples shall be collected every 12 months and tested as provided in section 57.8(b) of this Part. The first such sampling and testing shall occur within three months of the effective date of this section.
(c) Flocks containing less than 3,000 birds shall be exempt from the sampling and testing required by this section.

(a) Requirements for producers utilizing all in-all out management for commercial egg producing poultry flocks.