Hi Charles,
Once the plan is developed and formally approved, it becomes part of the baseline. That means any changes to the plan itself (e.g., changing who approves key messages, shifting escalation paths, or altering reporting frequency) must go through Integrated Change Control. However, some details (like exact recipients of a weekly status email) may not be known at the start. As those details emerge, they’re added or refined without going through formal change control, as long as the structure, approach, and key commitments of the plan remain unchanged.