This read-write TruthValue, when true, makes this metering class accept all traffic unconditionally, treating its rate as effectively infinite and ignoring the configured rate and burst-size token-bucket parameters; it is also used as the effective setting when metering isn't supported at all. An admin sets this true for rules that should never be rate-limited, or leaves it true by default on platforms lacking metering hardware. For example, an admin wanting a specific high-priority management traffic class to never be throttled would set this true for its metering class entry.