(a) It is unlawful for a person to be at the same time a director, officer, partner, or trustee in any two or more firms, partnerships, trusts, associations, or corporations or any combination of them engaged in commerce, if these firms, partnerships, trusts, associations, or corporations or a combination of them, are by virtue of their business and location or operation, competitors and if the effect may be substantially to lessen competition or tend to create a monopoly.

(b) A person may not by the use of a representative accomplish the result prohibited in (a) of this section.

(c) The validity or invalidity of an act of a director, officer, or trustee done by the director, officer, or trustee while occupying the position in violation of this section shall be determined by the statutory and common law of the state relating to corporations, trusts, or associations.

(d) The attorney general may bring an action at any time to cause a director, officer, or trustee who may be occupying such a position in violation of this section to vacate the office or offices to effect the termination of the prohibited interlocking relationship.

(e) A person affected by an act of a director, officer, or trustee may bring an action at any time to cause the director, officer, or trustee who may be occupying the position in violation of this section to terminate the prohibited interlocking relationship.

(f) The court, upon finding that a director, officer, or trustee is holding office in violation of this section, shall order the person to terminate the interlocking relationship, and, in the case of a trustee, the court may, when it considers it appropriate, order the trustee to vacate the office of the trustee. A remedy provided in this section does not limit and is in addition to any other remedy available under another section of this chapter or another law.