(b) Suit for Injunctive Relief. The attorney general may file suit against any person, other than a municipal corporation, in district court in Travis County, or in any county in the State of Texas in which any of the named defendants resides, does business, or maintains its principal office on behalf of the State of Texas to enjoin temporarily or permanently any activity or contemplated activity that violates or threatens to violate any of the prohibitions in Section 15.05 of this Act. In any such suit, the court shall apply the same principles as those generally applied by courts of equity in suits for injunctive relief against threatened conduct that would cause injury to business or property. In any such suit in which the state substantially prevails on the merits, the state shall be entitled to recover the cost of suit. Upon finding a violation of the prohibition against acquiring the stock, share capital, or assets of a person in Subsection (d) of Section 15.05 of this Act, the court shall, upon further finding that no other remedy will eliminate the lessening of competition, order the divestiture or other disposition of the stock, share capital, or assets and shall prescribe a reasonable time, manner, and degree of the divestiture or other disposition.