(a) Except as otherwise provided in subsection (b), a proceeding to adjudicate parentage may be joined with a proceeding for adoption, termination of parental rights, the allocation of parental responsibilities or parenting time, child support, dissolution of marriage or civil union, declaration of invalidity of marriage or civil union, legal separation, probate or administration of an estate, or other appropriate proceeding.
     (b) A respondent may not join a proceeding described in subsection (a) with a proceeding to adjudicate parentage brought under the Uniform Interstate Family Support Act.