(a) In a delinquency proceeding begun in this territory against an insurer domiciled in this territory, claimants residing in reciprocal states may file claims either with the ancillary receivers, if any, in their respective states, or with the domiciliary receiver. All such claims must be filed on or before the last date fixed for the filing of claims in the domiciliary delinquency proceedings.
(b) Controverted claims belonging to claimants residing in reciprocal states may either (1) be proved in this territory as provided by law, or (2), if ancillary proceedings have been commenced in such reciprocal states, may be proved in those proceedings. In the event a claimant elects to prove his claim in ancillary proceedings, if notice of the claim and opportunity to appear and be heard is afforded the domiciliary receiver of this territory as provided in section 1265 of this title with respect to ancillary proceedings in this territory, the final allowance of such claim by the courts in the ancillary state shall be accepted in this territory as conclusive as to its amount, and shall also be accepted as conclusive as to its priority, if any, against special deposits or other security located within the ancillary state.