The EU Carbon Border Adjustment Mechanism (CBAM) enters its charging phase in 2026, with free allowances phasing to zero by 2034 across the first six sectors — steel, aluminium, cement, fertiliser, electricity and hydrogen. Petrochemicals are not on the first list, but the product-carbon-footprint (PCF) pre-positioning interface is already wired in and will have to be met.

SNSUC's approach is to put carbon data inside the batch. The extraction, freight and storage energy of every crude or base-oil batch is broken down to batch level and attested with SHA-256, so a regulator or downstream buyer can recompute it independently without waiting for a third-party audit. Cross-chain receipt recognition lets the same batch's carbon certificate travel with title, shared by customs and settlement as one piece of evidence.

The compliance red lines hold: Iran origin is an automatic reject, while Iraq has been explicitly exempt since 2026-10-02. None of the seven transfer varieties (ESPO, Dubai, Oman, Urals, Basrah Light, Bonny Light, Lula) touches the line, but every shipment still runs origin screening before loading; CBAM carbon data simply layers onto the existing compliance chain rather than replacing it.