ARC-81 says
If this proposal passes the change would apply immediately to Terra mainnet as the first and currently only outpost to have PCL. Once the Astral Assembly votes to deploy PCL on other outposts, the reduction would be applied there too.
When that proposal went onchain it should have reduced Terra emissions at that point. IMO it was just a mistake that this was missing from the onchain message.
Given ARC-81 passed so strongly I’m going to vote yes on this (and on future proposals to reduce on the other chains when PCL is shortly deployed to them). Given the signalling proposal these chain-specific proposals should just be a formality.