(a) Participation by a petitioner in a proceeding under this Act before a responding tribunal, whether in person, by private attorney, or through services provided by the support enforcement agency, does not confer personal jurisdiction over the petitioner in another proceeding.
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(b) A petitioner is not amenable to service of civil process while physically present in this state to participate in a proceeding under this Act. (c) The immunity granted by this Section does not extend to civil litigation based on acts unrelated to a proceeding under this Act committed by a party while physically present in this state to participate in the proceeding.