11. A school corporation may give a regional school board or an association of school corporations an exclusive mandate for the purposes of sections 52 to 93.
Such mandate shall not be revocable except at the time fixed by section 22 for making an application for certification.
The investigation commissioner may decide as to the validity of such mandate.
While it is in force, the obligations contemplated by sections 53 and 56 shall rest upon the mandatary only, but the latter may not require an association of employees to negotiate a collective agreement applicable to a territory greater than that of a regional school board.
1965 (1st sess.), c. 50, s. 1; 1969, c. 47, s. 6.