1C - Cash balance or similar plan - Plan has a "cash balance" formula. For this purpose, a "cash balance" formula is a benefit formula in a defined benefit plan by whatever name (for example, personal account plan, pension equity plan, life cycle plan, cash account plan, etc.) that rather than, or in addition to, expressing the accrued benefit as a life annuity commencing at normal retirement age, defines benefits for each employee in terms more common to a defined contribution plan such as a single sum distribution amount (for example, 10 percent of final average pay times years of service, or the amount of the employee's hypothetical account balance).

3D - Pre-approved pension plan - A master, prototype, or volume submitter plan that is the subject of a favorable opinion or advisory letter from the IRS.