§ 6-1. Dues check-off.

(a) Authorized.

Any employee organization certified as the exclusive representative of employees in a designated unit, upon the presentation of dues deduction authorization cards duly executed by individual employees in said unit, shall be entitled to have such employees' membership dues deducted from their paychecks and remitted to the designated employee organization.

(b) Term.

Such authorization shall be irrevocable for the period of 1 year, and automatically renewable from year to year thereafter, unless written notice of termination by the employee is given to the employer at least 30 days prior to the anniversary date.

An employee organization shall be entitled to such dues deductions:

(1) only in those units where said employee organization has been certified as the exclusive representative; and

(2) only during the period that said employee organization continues to be so certified as the exclusive representative.