type
    TPerson = record
      name: string;
      age: integer;
    end;
    TThrteenPersons = array[10..22] of TPerson;

  procedure Check(const aPerson: TPerson);
  var
    vPerson: TThrteenPersons;
  begin
    vPerson[11] := aPerson; // this is ok
    vPerson[1] := aPerson; // this one gives compile error
  end;