This qualifer allows the user to specify how many blocks
  (decimal) that a user with a given UIC may use on a given
  volume, OVER AND ABOVE the user's PERMQUOTA limit.  If
  this qualifier is not present or no value is specified, the
  PERMQUOTA value of the default record [0,0] is used.

  EXAMPLE:
   ADD [11,17] /OVERDRAFT=200

  This will add a quota record to a volume allowing the user
  with UIC = [11,17] an overdraft of 200 blocks and a permanent
  quota of the default value.