These are final regulations relating to the tax qualification of plans maintained by more than one employer pursuant to section 413(c) of the Internal Revenue Code, often referred to as multiple employer plans or MEPs. The regulations provide limited relief to a defined contribution MEP in the event of a failure by one employer maintaining the plan to satisfy an applicable qualification requirement or to provide information needed to ensure compliance with a qualification requirement. The regulations affect participants in MEPs, MEP sponsors and administrators, and employers maintaining MEPs.