(225 ILCS 320/17) (from Ch. 111, par. 1116)
    Sec. 17. (a) Upon the payment of the required fee, an applicant who is a plumber, registered or licensed in another state, or municipality, may, without examination, be granted a license as a licensed plumber by the Department provided:
    (1) that the applicant is at least twenty-one years of age and is a citizen of the United States, or has declared his intention to become a citizen, and
    (2) that the Board finds that the requirements for the registration or licensing of plumbers in such other state or municipality, were, at the date of the registration or license, substantially equal to the requirements then in force in this State, and provided that the same privilege of registration is accorded by said state or municipality, to licensed plumbers in the State of Illinois.
    (b) A plumber licensed or registered as a plumber by another state or municipality, whose license requirements are substantially equal to the requirements for an Illinois Plumber's license, and such governmental unit, does not have a reciprocal agreement with the State of Illinois, may apply for and be issued an Illinois Plumber's license provided that the applicant successfully passes the Illinois plumber's examination and pays the required fees.
(Source: P.A. 79-1000.)