Pre-approved plans are made available by providers such as banks, investment firms, insurance companies, and law firms. Adopting employers of pre-approved plans may generally rely on the vendor's approval letter without the need to get their own individual determination letters. Certain types of retirement plans, as well as certain component parts of retirement plans, are ineligible for pre-approved plan status under Internal Revenue Service (IRS) guidance or cannot rely on a pre-approved plan sponsor's opinion or advisory letter regarding certain provisions in the plan. This Checklist describes the types of plans and plan provisions that are ineligible for pre-approval by the IRS.