What plan will describe the stakeholder groups, communication needs, and the level of formality that is appropriate for the requirements?

The Requirements Management Plan describes how requirements will be elicited, documented, prioritized, traced, and changed - it does not address stakeholder communication needs or formality levels.

The Project Management Plan is a high-level overarching document covering all project management knowledge areas and is not specific to requirements communication or stakeholder formality.

The Scope Management Plan defines how project and product scope will be defined, validated, and controlled - it does not address how stakeholder groups will receive requirements communications.

The Business Analysis Communication Plan explicitly identifies stakeholder groups who need to receive requirements information, defines what each group needs to know, and determines the appropriate level of formality for each communication. It is distinct from broader project communications planning because it focuses specifically on requirements-related interactions between the business analyst and stakeholders.