This OID indicates whether cell tagging is enabled on lower-priority (CLP 0) transmit traffic, allowing out-of-profile cells to be marked instead of discarded. Network engineers enable tagging to preserve traffic that slightly exceeds the rate limit, marking it with a flag that tells the network it can drop these cells if congestion occurs. For example, when enabled and a cell arrives slightly outside the traffic envelope, it is tagged CLP=1 and forwarded; when disabled, it is discarded immediately.