45 CFR § 1641.5 - Debarment.

(a) IPAs debarred from providing audit services for all recipients are prohibited from soliciting or entering into any new contracts for audit services with recipients for the duration of the specified period of debarment. Recipients shall not knowingly award contracts to, extend or modify existing contracts with, or solicit proposals from, such IPAs. Debarred IPAs also are prohibited from providing audit services to recipients as agents or representatives of other IPAs.

(b) IPAs debarred from providing audit services for one or more specific recipient(s) are prohibited from soliciting or entering into any new contracts for audit services with such recipient(s) for the duration of the period of debarment as determined pursuant to this part. The affected recipient(s) shall not knowingly award contracts to, extend or modify existing contracts with, or solicit proposals from, such IPAs. Debarred IPAs also are prohibited from providing audit services to the affected recipient(s) as agents or representatives of other IPAs, and are required to provide prior written notice to the debarring official before providing such services to other recipients. Debarred IPAs also must provide prior written notice of the debarment to any recipient for which the IPA provides audit services.