Discuss this at the outset
That's perfectly fine. You'd follow the procedure set forth by your company in your normal contract. And it should be something you discuss when you develop your Roleshare Plan with potential partners.
Some microteams want to be promoted together, for example. Others are happy with either/or - transparency will be key to driving trust. You'll want to include this in your Working Principles.
See the Roleshare Guide and templates for Working Principles example.