The governance model, portfolio oversight, change control, and communication management are all part of the portfolio:

The strategic plan defines the organization's strategic direction and objectives but does not contain operational elements like change control or communication management.

The prioritization model provides criteria and methods for ranking portfolio components and does not address governance, oversight, or communication.

The portfolio management plan is a comprehensive document that defines how the portfolio will be managed, including governance structures, oversight mechanisms, change control processes, and communication approaches. It serves as the central reference for all portfolio management processes and integrates these elements into a cohesive framework. This distinguishes it from narrower documents like the charter or prioritization model, which address specific aspects rather than the full management lifecycle.

The portfolio charter authorizes the portfolio and defines its high-level scope and objectives but does not contain the detailed management processes listed in the question.