Erin Koen, head of governance at the Uniswap Foundation, posted on the Uniswap Governance Forum that the V4 code, like Uniswap v3, is governed by a commercial source code license (BSL), which prohibits commercial or production use of the V4 code base unless additional usage authorization is granted. Additionally, Erin Koen published an estimated timeline for the launch of V4, whose protocol code was announced on June 13; the protocol code freeze depends on the successful integration of EIP-1153 into the Cancun upgrade, which is expected to occur as early as September; The protocol code will be audited before it is deployed. It is not yet possible to determine how long the audit process will take, but it is expected to range from one month to four months.