Session / Change tariff

Change the tariff for a session and trigger recalculation of charging periods.
This action supports loyalty program integrations where discounts need to be applied mid-session.

The tariff change is only available when:

• Billing status is NOT "Completed"
• For running sessions: duration is under 3 hours
• For roaming sessions (Ampeco as eMSP): session must be finished and have a CDR received
• No recalculation is already in progress
• For local charge point sessions: a StartTransaction message must exist