Today, DCSA released version 2.2 of its Track & Track Interface Standard for customer-facing events. The release includes the DCSA Subscription Callback API, which allows customers (shippers/consignees) to subscribe to receive automatic updates of shipment events from carriers. In addition, security has been enhanced with subscription-ID and notification-signature headers. The release also supports a better customer experience with more efficient data inquiry and handling, including support for the following document events: Cargo Survey, Customs Inspection, Verified Gross Mass, Dangerous Goods Declaration, and Out of Gauge Declaration.