The watch item on the Strait of Hormuz this Sunday is not an event but an instrument taking shape. Traffic through the waterway stands at about twenty percent of its pre-war average according to CNN's analysis of British maritime-agency figures, even as Washington's Energy Department counts eight to nine million barrels a day attempting dark transits with transponders off. [1] Tehran's Supreme National Security Council chief Mohsen Rezaei has threatened to halt all flow if any neighboring state joins the American economic campaign. [1]

The machinery behind those headlines deserves attention before any list appears on them. Iran's Persian Gulf Strait Authority, created to administer post-ceasefire transits, already requires vessels to register and follow an approved coastal route rather than the traditional southern lane, and its forces stopped two vessels for rule violations as early as July. [2] A registrar that logs every hull, enforces route compliance and publishes violations is one signature away from converting navigation into licensing.

Forward context, labeled as such because it postdates this edition: wire reporting dated Monday, August 24 says Iran has blacklisted dozens of tankers for transit-rule breaches, with fines, detention and confiscation threatened against listed vessels and any ship transferring cargo alongside them. [3] Nothing in that dispatch belongs to Sunday's verified record, and this page asserts it only as the direction of travel.

The system logic is Michael Lewis-simple. Rules become lists; lists become premiums; premiums become routes. Whoever tracks the blacklist before the insurers do will understand the next month of oil prices earlier than anyone reading tanker traffic alone.

-- THEO KAPLAN, San Francisco