Fuel oil used domestically carries consumption tax of roughly ¥1,218/t, while bitumen sits outside the levy. Goods moved through the bonded zone defer VAT and consumption tax until leaving the zone; outright trade pays on arrival. Three-document consistency and SHA-256 title fingerprints, placed upstream, lock the deferral inside a compliant path.

FX guidance requires each offshore triangular trade to settle, in principle, at one bank and in one currency; cross-bank or cross-currency deals need prior reporting. SNSUC's crude transfers use seven base grades (ESPO, Dubai, Oman, Urals, Basrah Light, Bonny Light, Lula); settlement shortens from T+2 to T+1, with three-document consistency and SHA-256 title fingerprints positioned upstream.