This read-create truth value controls how the paired ieee8021FqtssDeltaBandwidth object is interpreted for this traffic class: false(2) uses the standard interpretation defined in clause 34.3.1, while true(1) locks the class bandwidth to a fixed interpretation instead. Admins set it when they need to pin a traffic class's bandwidth allocation to a fixed value rather than letting it follow the normal delta-bandwidth calculation behavior. For example, an admin needing a guaranteed, unchanging bandwidth reservation for a critical traffic class would set this to true(1) to lock that class's bandwidth interpretation.