This document is the Schedule MB - Multiemployer Defined Benefit Plan and Certain Money Purchase Plan Actuarial Information form that is filed as an attachment to the Form 5500 Annual Report. It requires multiemployer defined benefit plans and certain money purchase plans to provide detailed actuarial data, including information on plan assets, funding targets, current liabilities, contribution amounts, and actuarial assumptions and methods. This schedule is used to assess the plan's funding status and compliance with minimum funding requirements.