(a) If the claimant objects to NIOSH's reconstruction of the radiation dose to which the employee was exposed, either in writing or at the oral hearing, the FAB reviewer has the discretion to consult with NIOSH as part of his or her consideration of any objection. However, the HHS dose reconstruction regulation, which provides guidance for the technical methods developed and used by NIOSH to provide a reasonable estimate of the radiation dose received by an employee, is binding on FAB. Should this consultation take place, the FAB reviewer will properly document it in the case. Whether or not NIOSH is consulted, and as provided for in § 30.317, the FAB reviewer may decide to return the case to the district office for referral to NIOSH for such further action as may be appropriate.

(b) If the claimant objects to OWCP's calculation of the recommended probability of causation in a Part B radiogenic cancer claim, the FAB reviewer has the discretion to consider if OWCP used incorrect factual information when it performed this calculation. However, the statute requires that OWCP use a particular methodology, established by regulations issued by HHS at 42 CFR part 81, when it calculates the recommended probability of causation.