11 U.S.C. § 903: Reservation of State power to control municipalities

This chapter does not limit or impair the power of a State to control, by legislation or otherwise, a municipality of or in such State in the exercise of the political or governmental powers of such municipality, including expenditures for such exercise, but—(1) a State law prescribing a method of composition of indebtedness of such municipality may not bind any creditor that does not consent to such composition; and (2) a judgment entered under such a law may not bind a creditor that does not consent to such composition.