OT15850 - PRT: tax-exempt tariffing receipts - transmedian fields
Where a field is partly within the jurisdiction of the UK government and partly within the jurisdiction of the government of another country FA80\S107 treats the foreign sector of the field as being included in the UK oil field (OT13450). But for the purposes of the tax-exempt tariffing receipts rules OTA83\S6A(6) treats the foreign sector as a separate foreign field (OT15840).
See also Disqualifying assets (OT15860) where an asset is a qualifying asset (OT15100) in relation to a participator in the UK sector of a transmedian field and also a chargeable asset in relation to a participator in the foreign sector.