A school, group of schools, subdivision or department of a group of schools, or a subdivision or department of a school whose school innovation zone plan has been approved in accordance with section five of this article may make a job posting for a teacher vacancy at the school, the group of schools, the subdivision or department of a group of schools, or the subdivision or department of a school designated as an innovation zone that sets forth standards or qualifications that exceed the standards and qualifications provided in section seven-a, article four, chapter eighteen-a of this code: Provided, That teachers in the county approve the job posting by majority vote: Provided, however, That the county superintendent administers the vote and the record of the vote remains on file in the personnel office of the county board until the school group of schools, subdivision or department of a group of schools, or a subdivision or department of a school is no longer designated as an innovation zone.