N.Y. Comp. Codes R. & Regs. tit. 12, § 355.3
(d) A student is deemed not to be in employment under this law if:
(2) he is in regular attendance during the daytime as a student in an elementary or secondary school and is working under a cooperative work-study program approved by the State Commissioner of Education and regularly operated and supervised by a local board of education.
Determination as to whether a person is or is not a “student” may be affected by the worker's intent as disclosed by all of the circumstances, that is, whether the work is a temporary job or work taken on and performed with usual school work and subordinate thereto.
(g) The following are excluded from the definition of employment:
(6) Casual employment.
(7) Extra employment.