This read-write BITS value sets which mutually-limited features (such as ipV4routingEnabled, policyBasedVlanEnabled, and qualityOfServiceEnables) will be enabled at the next system load, subject to the same hardware and product combination limits as the live feature set. An admin cares because feature combinations can be limited by shared ASIC resources or product-specific rules, so a requested combination might not be honored after reboot if it conflicts. For example, an admin planning to add QoS to a device already running policy-based VLANs sets this bitmask ahead of a reboot, then verifies the running rlDependendFeaturesEnabled afterward to confirm the combination was accepted.