Section 1733.203-70 - Designation of the Interior Board of Contract Appeals to decide OPM appeals(a) The Interior Board of Contract Appeals (IBCA) has been designated by the Director of OPM to consider and determine appeals from decisions of a contracting officer arising under a contract or relating to a contract made by OPM. This delegation governs disputes between OPM and its prime contractors and does not encompass any claim made by a third party beneficiary of, or by a subscriber to, a Federal employee insurance program.(b) The address of IBCA is 801 North Quincy Street, Arlington, VA 22203.(c) IBCA rules of procedure can be found in 43 CFR part 4.51 FR 44296, Dec. 9, 1986, as amended at 68 FR 62022, Oct. 31, 2003