[ITU-T Y.3129] specifies the requirements and framework for deterministic networking with a set of work conserving packet schedulers that guarantees end-to-end (E2E) latency bounds to flows. Y.3129 also specifies the required packet metadata for guaranteeing the bounds. Y.3129, like other scheduling mechanisms for latency guarantee, relies on a resource reservation and commitment mechanism, which ensures the sum of the service rates of active flows is less than the link capacity, in all the links in a path. This Recommendation specifies the requirements and framework for estimating the service rates of active flows for admission control, without managing flow state information, but with the packet metadata already defined in Y.3129 and an added metadata.