2. a. Any such shared personnel who are not in a position for which tenure may be granted pursuant to this chapter shall be considered to be employed by all participating school districts. Any decisions regarding the appointment or compensation of such shared personnel shall be made with the consent of a majority of each of the boards of education of each participating school district. Compensation and benefits of such shared personnel shall be provided by each participating school district, based on an agreed-upon formula. b. Each agreement to share personnel who are in a position for which tenure may be granted pursuant to this chapter shall designate a participating district as the principal employing district. Any such shared personnel shall be considered to be employed by the principal employing district; provided that any decisions regarding the probationary appointment and compensation package of such shared personnel shall be made with the consent of a majority of each of the boards of education of each participating district. Decisions regarding the termination, discipline or tenure of such shared personnel shall be made by the principal employing district in consultation with all other participating districts, and services rendered by such shared personnel under such agreement in any other participating district shall be deemed to have been rendered in the principal employing district for all purposes under this chapter, including tenure credit, seniority and discipline.

1. (i) The agreement to share personnel shall allow other participating districts to be substituted as the principal employing district. Notwithstanding any other provision of law, upon substitution of a new principal employing district, the shared employee shall be considered an employee of the new principal employing district with the same tenure status he or she maintained in such prior principal employing district. For any such shared employee for salary, sick leave and any other purposes, the length of service credited in such prior principal employing district shall be credited as employment time with such new principal employing district.
2. (ii) Where the principal employing district abolishes the position of a shared employee and creates a new position for the performance of similar duties, in determining the right of the employee under subdivision one of section three thousand thirteen or subdivision one of section twenty-five hundred ten to appointment to such new position, the new position shall be deemed similar if more than forty percent of the functions of the new position were performed by the shared employee in the shared position.
3. (iii) Where a participating district other than the principal employing district determines to discontinue the services of a shared employee pursuant to the terms of the agreement to share personnel, the employee shall retain his or her tenure rights in the principal employing district only.