31 CFR 205.13 - How do you determine when State or Federal interest liability accrues?
(b) We and a State may agree in a Treasury-State agreement that no State or Federal interest liability will accrue for indirect costs or indirect allocated costs based on an indirect cost rate. This indirect cost must be consistent with OMB Circular A-87 (For availability, see 5 CFR 1310.3.) and be in accordance with this subpart A. The indirect cost rate may be a Statewide indirect cost rate or a public assistance cost rate, where appropriate.