Monetary threshold for appeals: SLPs below the prescribed limit should not be pursued, except for constitutional or ultra vires issues. Proposals to file Special Leave Petitions should comply with the Board's prescribed monetary limits and be fully completed before submission; however, SLPs may be forwarded irrespective of amount where (a) constitutional validity of an Act or Rule is challenged, or (b) a Notification, Instruction, Order or Circular has been held illegal or ultra vires, and such proposals must be sent to the Commissioner (Legal).