N.Y. Comp. Codes R. & Regs. tit. 8, § 335.8
(a) Except as provided in paragraphs (a)(1)-(2) and subdivision (b) of this section and in paragraph (b)(2) of section 335.9 of this Part, at any college further employment, in a professional title in which permanent appointment may be granted, of a professional employee who has completed seven consecutive years of full-time service as a professional employee at that college, the last two years of which have been in that professional title, must be on the basis of permanent appointment; provided, however, that such appointment shall not be effective until made so by the chancellor.
(2) Upon completion of four consecutive years of full-time service as a professional employee at that college, the last year of which has been in that professional title, a professional employee in a title eligible for permanent appointment may initiate early consideration for permanent appointment through notification to the chief administrative officer of the college. To be effective, such notification must be in writing and received by the chief administrative officer of the college no later than nine months prior to the date upon which such employee would otherwise receive written notice that a term appointment is not to be renewed upon expiration. In the event the chief administrative officer of the college grants the employee's request for such early consideration, any further employment of that employee after completion of six consecutive years of full-time service as a professional employee at that college, the last two years of which have been in that professional title, must be on the basis of permanent appointment; provided, however, that such appointment shall not be effective until made so by the chancellor.
(b) Additional appointments.
A professional employee holding a permanent appointment or a term appointment at one college who is appointed to a professional title at another college may be given that appointment for a term not to exceed three years.
(c) Service credit.