Subchapter I. Creditors and Claims 11 U.S. Code §501. Filing of proofs of claims or interests 11 U.S. Code §502. Allowance of claims or interests 11 U.S. Code §503. Allowance of administrative expenses 11 U.S. Code §504. Sharing of compensation 11 U.S. Code §505. Determination of tax liability 11 U.S. Code §506. Determination of secured status 11 U.S. Code §507. Priorities 11 U.S. Code §508. Effect of distribution other than under this title 11 U.S. Code §509. Claims of codebtors 11 U.S. Code §510. Subordination 11 U.S. Code §511. Rate of interest on tax claims