Michigan Compiled Laws

Mich. Comp. Laws § 423.17 (2026)

Prohibited conduct; violation; civil fine.

✓ current as of July 2026

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EMPLOYMENT RELATIONS COMMISSION

Act 176 of 1939

423.17 Prohibited conduct; violation; civil fine.

Sec. 17.

A person shall not by force, intimidation, or unlawful threats compel or attempt to compel any person to do any of the following:

(a) Become or remain a member of a labor organization or otherwise affiliate with or financially support a labor organization.

(b) Refrain from joining a labor organization or otherwise affiliating with or financially supporting a labor organization.

History: 1939, Act 176, Imd. Eff. June 8, 1939 ;-- CL 1948, 423.17 ;-- Am. 1949, Act 230, Imd. Eff. May 31, 1949 ;-- Am. 2012, Act 348, Eff. Mar. 28, 2013 ;-- Am. 2023, Act 8, Eff. Feb. 13, 2024

Compiler's Notes:

Enacting section 1 of Act 348 of 2012 provides:

"Enacting section 1. If any part or parts of this act are found to be in conflict with the state constitution of 1963, the United States constitution, or federal law, this act shall be implemented to the maximum extent that the state constitution of 1963, the United States constitution, and federal law permit. Any provision held invalid or inoperative shall be severable from the remaining portions of this act."

Notes of Decisions

Cited in 10 cases, 1950–2016 · leading case: Michigan State AFL-CIO v. Callaghan, 15 F. Supp. 3d 712 (E.D. Mich. 2014).

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Michigan State AFL-CIO v. Callaghan, 15 F. Supp. 3d 712 (E.D. Mich. 2014). · cites it 12× “Mich. Comp. Laws § 423.14 (1). And another section prohibits coercion designed to compel workers to join, leave, or support a labor organization.”

James M. Sweeney v. Michael R. Pence, 767 F.3d 654 (7th Cir. 2014). “§ 23:983 (1976); Mich. Comp. Laws § 423.17 (2013); Miss. Const, art.”

Int'l Union of Operating Engineers Local 370 v. Wasden, 217 F. Supp. 3d 1209 (D. Idaho 2016). “§ 23:983 (1976); Mich. Comp. Laws § 423.17 (2013); Miss. Const.”

Edwards v. Grisham, 64 N.W.2d 715 (Mich. 1954). · cites it 3× “No question was raised as to any ruling of the trial court or the charge of the court to the jury or that any testimony was improperly received. The verdict must stand and judgment be rendered accordingly, unless the verdict shall be found to be against the overwhelming weight…”

Way Baking Co. v. Teamsters & Truck Drivers Local No. 164, 56 N.W.2d 357 (Mich. 1953). · cites it 2× “CL 1948, § 423.17, as amended by PA 1949, No 230 (Stat Ann 1950 Rev § 17.”

Cross Co. v. UAW Local No. 155, 123 N.W.2d 215 (Mich. 1963). “” See, also, CLS 1956, § 423.17 (Stat Ann 1960 Rev § 17.454[18]), which provides: “It shall be unlawful (1) for any employee or other person by force or unlawful threats to force, or attempt to force any person to become or remain a member of a labor organization, or (2) for…”

Sweet v. Local 552, Barbers & Beauticians Union, 112 N.W.2d 218 (Mich. 1961). · cites it 4× “The court granted the injunction on the grounds that the picketing was in violation of CLS 1956, § 423.17 (Stat Ann 1960 Rev § 17.454[18]), which forbids force or unlawful threats in an attempt to have a person be *82 come or remain a member of a labor organization.”

Postma v. Int'l Bhd. of Teamsters, Chauffeurs, Warehousemen & Helpers of Am., 54 N.W.2d 681 (Mich. 1952). “406 of the American Fed *355 eration of Labor, supra, the Court held (the writer of this opinion dissenting) that, under the provisions of the statute (CL 1948, § 423.17, as amended by PA 1949, No 230 [Stat Ann 1950 Rev § 17.”

Cohen v. Detroit Jt. Bd. Amalgamated Clothing Workers, 42 N.W.2d 830 (Mich. 1950). “” In an amendment to his bill of complaint, plaintiff charges that defendant’s conduct, through its agents,* is in violation of CL 1948, § 423.17, as amended by PA 1949, No 230 (Stat Ann 1949 Cum Supp § 17.”

Dynamic Mfrs., Inc. v. Local 614 of Gen. Drivers, Warehousemen & Helpers of Am., 103 F. Supp. 651 (E.D. Mich. 1952). “Laws 1948, § 423.17. It is further contended by the plaintiff that the defendants are conspiring to destroy plaintiff’s business if plaintiff does not submit to these said unlawful labor objectives, and for the purpose of carrying out the said unlawful labor objectives, the…”

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