This proposal is a resubmission of ZIP-2. ZIP-2 reached quorum and was executed on ZKsync Era, however there was an issue that affected the execution of ZIP-2 on mainnet. As such, the proposal is being resubmitted.
For more information related to the recommendation to resubmit the proposal please see this forum post by the ZKsync Security Council.
Timing
ZIP-4 will be submitted onchain after ZIP-3 has been successfully executed. Based on the proposal lifecycle of ZIPs, ZIP-3 is on track to be executed by January 20.