The European Commission introduces limits on airlines adding fuel surcharges after passengers have already bought their tickets, responding to concerns about rising jet fuel costs. Under the reported rule, carriers cannot impose an additional surcharge after the purchase has been completed, provided the ticket was bought within the European Union. The change is presented as part of broader efforts to protect consumers during volatile energy and aviation pricing conditions. Airlines are expected to adjust their pricing and billing practices to comply with the new requirements for affected transactions. The reports also indicate that the restriction is tied to where the ticket purchase occurs, meaning the consumer protection applies in the EU context rather than universally to all bookings made outside the region. Details on the exact scope, enforcement, and any exceptions are not specified in the provided accounts, but the overall direction is to prevent last-minute cost add-ons after consumers have purchased air travel. Airlines may continue to price tickets with fuel-related costs upfront, but further surcharges after purchase are constrained under the described policy.