(b) The contracting officer shall make every effort to debrief the unsuccessful offeror as soon as practicable, but may refuse the request for a debriefing if, for compelling reasons, it is not in the best interests of the Government to conduct a debriefing at that time. The rationale for delaying the debriefing shall be documented in the contract file. If the contracting officer delays the debriefing, it shall be provided no later than the time postaward debriefings are provided under 15.506. In that event, the contracting officer shall include the information at 15.506(d) in the debriefing.