(a) Benefits based on service in employment as defined in subdivisions (9) and (10), section sixteen, article one-a of this chapter, are payable in the same amount, on the same terms and subject to the same conditions as compensation payable on the basis of other service subject to this chapter; except that benefits based on service in an instructional, research or principal administrative capacity in an institution of higher education shall not be paid to an individual for any week of unemployment which begins during the period between two successive academic years, or during a similar period between two regular terms, whether or not successive, or during a period of paid sabbatical leave provided for in the individual's contract, if the individual has a contract or contracts to perform services, in any such capacity for any institution or institutions of higher education for both such academic years or both such terms.
(b) Benefits based on service in employment defined in subdivisions (9) and (10), section sixteen, article one-a of this chapter, are payable in the same amount, on the same terms and subject to the same conditions as benefits payable on the basis of other service subject to this chapter, except that:
(1) With respect to services in an instructional, research or principal administrative capacity for an educational institution, benefits shall not be paid based on such services for any week commencing during the period between two successive academic years or terms, or during a similar period between two regular but not successive terms, or during a period of paid sabbatical leave provided for in the individual's contract, to any individual if such individual performs such services in the first of such academic years or terms and if there is a contract or a reasonable assurance that such individual will perform services in any such capacity for any educational institution in the second of such academic years or terms or after such holiday or vacation period.