2-4-1.1. Leave of absence from employment for legislative service--Restrictions on employee's right to serve in Legislature void. An employer shall grant a temporary leave of absence without loss of job status or seniority resulting therefrom, to any employee who is a member of the Legislature in order that such employee may perform any official duty as a member of the Legislature. Such temporary leave of absence may be with or without pay within the discretion of the employer. Any agreement between an employer and an employee which, as a condition precedent to employment, promotion or benefit enhancement, restricts the employee's right to serve in the Legislature is void as a matter of public policy.