N.Y. Comp. Codes R. & Regs. tit. 8, § 30-1.8
(a) A professional educator who is employed to devote a substantial portion of his time to instruction in one or more of the following subjects shall be deemed to serve in a special subject tenure area or areas encompassing such subject:
(b) A professional educator employed by a board of education or board of cooperative educational services to devote a substantial portion of his time to the provision of ancillary or supportive educational services in the following positions shall be deemed to serve in a special subject tenure area encompassing the duties of such position:
(c) A professional educator employed by a board of education or board of cooperative educational services to devote a substantial portion of his time to instruction in one of the following vocational subjects shall be deemed to serve in a special subject tenure area co-extensive with the certificate possessed by the individual at the time of the probationary appointment:
(e) A professional educator employed by a board of cooperative educational services to devote a substantial portion of his time to the provision of instructional support services in one of the following areas shall be deemed to serve in one of the following special subject tenure areas encompassing the duties of such subject: