A class of creditors or equity security holders whose claims or interests are unaltered under a Chapter 11 plan, with no changes to the legal, equitable, or contractual rights of the members of the class. An unimpaired class is not entitled to vote on a Chapter 11 plan, and is deemed to have accepted the plan. Defaults occurring before or after the bankruptcy filing may be cured in order to render the affected class unimpaired.
Bankruptcy Code § 1124. See also Impaired Class, Impairment, Non-Impairment Plan.