I have a very large project that will not start construction until 2022 or 2023 and it will be under construction for several years. I therefore want to be careful about sunset dates. I'm thinking to register it under v4.0 and "cherry pick" v4.1 credits. 

Q1: Has anyone seen or heard of USGBC implementing Sunset Dates for v4.0? If so, please direct me to where they are outlined. 

Q2: If you register a project under v4.0, is there a limit to how many v4.1 credits can be "cherry picked"?