From 1 June 2010 short sellers have an obligation to report their short positions in certain financial products to ASIC. Short position reports are not lodged via the ASIC website. They are lodged to ASIC using FIX protocol messages sent over a secure network to the ASIC FIX server.
ASIC requires each short position report to uniquely identify the short seller. If a short seller does not have an ACN, ARBN or BIC identifier, they must register to receive an ASIC identifier.
Short selling home page