CBAM enters its formal charging phase in 2026. Free allocation is no longer granted at the old ratio; instead it tapers year by year along a curve that reaches zero by 2034. The first batch covers six sectors — cement, iron and steel, aluminium, fertilizers, electricity, and hydrogen. Petrochemicals are not yet named, but border carbon cost will seep downstream through finished goods.

For operators moving cross-border energy and chemicals, the real work is not tax avoidance but turning carbon data into verifiable assets. Recording product carbon footprint per batch alongside an SHA-256 hash lets any buyer recompute each cargo's carbon intensity in a browser, trusting the computation rather than the seller's self-reported figure.

Cross-chain receipt recognition takes this one step further: once a warehouse receipt is registered on-chain, banks, customs, and buyers see the same title and carbon record. Pledge lending compresses from T+3 to T+0, and secondary transfers skip repeated verification. This matters most for transfers — title changes hands offshore several times, so carbon and title must stay bound together.

On sanctions, keep the lines clear: Iran remains on the denied-origin list and trading services for Iranian-origin cargo are not provided. Iraq's Basrah Light has been exempt since 2026-10-02 and can be contracted directly. The two must not be conflated; external material should not present the two countries as the same class of embargoed origin.