N.Y. Comp. Codes R. & Regs. tit. 10, § 5-1.31
(a) The supplier of water shall implement a service protection program (also known as containment) which includes the following:
(b) A certified backflow prevention device tester shall meet the following requirements:
(2) Conditions of certification.
(3) Recertification requirements.
(ii) An individual that allows his or her certification renewal to lapse for more than one year after the expiration date will be required to repeat the initial certification requirements set forth in paragraph (1) of this subdivision.
(c) Enforcement.
Upon notice and opportunity for a hearing, a tester’s certification may be suspended or revoked. Revocation or suspension may be based on, but not limited to, fraud or misrepresentation by the certified tester; gross incompetence or gross negligence on a particular occasion; or negligence or incompetence on more than one occasion. Examples of such conduct include, but are not limited to:
(d) The supplier of water may not allow a user to establish a separate source of water. However, if a user justifies the need for a separate source of water, the supplier of water shall protect the public water system from such separate source of water by ensuring that such source does not pose a hazard in the following manner: