You are confused. โPolicyโ in Bitcoin is codified by the consensus rules. Nodes enforce adherence to the consensus rules: no mined blocks that break consensus rules shall be added to their copy of the chain. The consensus rules are hard-coded into the protocol, and the version of bitcoin software you run determines which protocol rules you are enforcing. Mempool forwarding settings are not policy, and are of little consequence. Find something more interesting to worry about.