(720 ILCS 510/3.1) (from Ch. 38, par. 81-23.1)
    Sec. 3.1. Medical Judgment. No abortion shall be performed except by a physician after either (a) he determines that, in his best clinical judgment, the abortion is necessary, or (b) he receives a written statement or oral communication by another physician, hereinafter called the "referring physician", certifying that in the referring physician's best clinical judgment the abortion is necessary. Any person who intentionally or knowingly performs an abortion contrary to the requirements of Section 3.1 commits a Class 2 felony.
(Source: P.A. 83-1128.)