Hi Blanche
What you have mentioned is the implication of the approved project charter .
I came across 1 practice question about the purpose of project charter . Out of 4 , the right option mentioned is " to formally authorize a project or a phase & document initial requirements which satisfy the stakeholders needs & expectations.
However, pmbok 6 mentions that project charter authorizes the project. It doesn't mention about the commencement of the phase. That's why I posted this query.