This document specifies the transport-level use of the TIMESTAMP and TIMESCALE properties registered by [loc], independent of the LOC container itself. A track-level Timescale property establishes the units, and an object-level Timestamp property carries the presentation time of each object. Exposing media time to the transport lets relays make consistent age-based decisions (e.g. dropping stale objects) without parsing the media container, and it remains consistent across hops regardless of buffering or jitter. No new code points are requested: an endpoint implementing this document is on the wire indistinguishable from a LOC endpoint that carries only these two properties.