(820 ILCS 15/1) (from Ch. 48, par. 2b)
Sec. 1.
Every undertaking or promise hereafter made, whether written or
oral, express or implied, constituting or contained in any contract or
agreement of hiring or employment between any individual, firm, company,
association or corporation, and any employee or prospective employee of the
same, whereby
(a) either party to such contract or agreement undertakes or promises
not to join, become, or remain a member of any labor organization or of any
organization of employers, or
(b) either party to such contract or agreement undertakes or promises
that he will withdraw from an employment relation in the event that he
joins, becomes, or remains a member of any labor organization or of any
employer organization,
is hereby declared to be contrary to the public policy of the State of
Illinois and wholly void, and it shall not be enforceable in any
court and shall not
afford any basis for the granting of legal or equitable relief by any
court.
(Source: P.A. 84-1438.)
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