Clause 5.1 to 5.10: Content of the quality plan, scope to customer communication – ISO 10005:2005
ISO 10005:2005 5.2: Scope of the quality plan
The plan should state its scope plainly: a short account of what the specific case is for and what it is expected to achieve; which parts of the case the plan covers, with any limitations; and the conditions under which it is valid, for example dimensions, temperature range, market conditions, availability of resources or QMS certification status.
This control maps to 27 controls across 5 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.