N.Y. Comp. Codes R. & Regs. tit. 8, § 335.23 – Term of obligation.

(a) calendar year obligation—an annual obligation of service for the full year, i.e., 12 months; or
(b) academic year obligation-an annual obligation of service for the academic year, not to exceed 10 months; or
(c) college year obligation-an annual obligation of service for any period less than the full year.

The term of professional obligation, except in the case of part-time or temporary employment where the obligation may be less, shall be one of the following as determined by the chief administrative officer, or designee: