#exemption__freedom  immunity from an obligation or duty
  supertype:  unsusceptibility__immunity  the state of not being susceptible: "unsusceptibility to rust"
  subtype:  amnesty  a period during which offenders are exempt from punishment
  subtype:  diplomatic_immunity  exemption from taxation or normal processes of law that is offered to diplomatic personnel in a foreign country
  subtype:  indemnity  legal exemption from liability for damages
  subtype:  impunity  exemption from punishment or loss
  subtype:  grandfather_clause__grandfatherclause  an exemption based on circumstances existing prior to the adoption of some policy; used to enfranchise illiterate whites in US south after the Civil War

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