; or (2) may serve as trustee. (b) Duties The trustee shall— (1) perform the duties required under paragraphs (2) through (5) and (7) of section 704; (2) appear and be heard at any hearing that concerns— (A) the value of property subject to a lien; or (B) confirmation of a repayment plan, a residence plan, or a property plan; (3) advise, other than on legal matters, and assist the debtor in the formulation of, and performance under, any plan; (4) ensure that the debtor commences making timely payments under section 1025; (5) in the case of a debtor against whom there is a claim for a domestic support obligation, provide the notices required under subsection (d); and (6) in the case of a debtor engaged in business as described in section 1003(a), perform the duties required under paragraphs (3) and (4) of section 1106(a). (c) Prohibitions The trustee may not— (1) serve as an advocate for debtors or creditors; (2) advise debtors or creditors on legal matters; or (3) raise an objection to a plan filed under section 1021 solely on the basis of the treatment of a secured claim under the plan. (d) Domestic support claim notice (1) Definition of state or local child support enforcement agency In this subsection, the term State or local child support enforcement agency means any agency of a State or political subdivision thereof operating pursuant to a plan described in section 454 of the Social Security Act ( 42 U.S.C. 654 ) that has been approved by the Secretary of Health and Human Services under part D of title IV of such Act ( 42 U.S.C. 651 et seq.). (2) Additional duties In the case of a debtor against whom there is a claim for a domestic support obligation, the trustee shall— (A) provide written notice of the claim to the holder of the domestic support obligation that includes— (i) a notice of the right of the holder to use the services of a State or local child support enforcement agency for assistance in collecting child support during and after the case