** Electro Optic Systems EOS.AX slips as much as 9.9% to A$9.650; marks biggest intraday pct drop since February 12
** Defense co says Australian bourse operator ASX ASX.AX directed co to review continuous disclosure policy to ensure it's in line with expectations
** ASX says co's contract win announcement on December 15 not sufficiently detailed to meet expectations
** Adds co failed to disclose market sensitive information
** YTD, EOS up 5.2%
(Reporting by Nichiket Sunil in Bengaluru)
((Nichiket.Sunil@thomsonreuters.com))