The latest on Antares hats is that existing hats will be perfectly legal to compete BD in 2016.
Protective hats must meet one of the following standards;
PAS 015 (BD strongly recommends that hats are BSI Kitemarked)
ASTM F1163 (2004) with SEI mark
Australian & New Zealand All AS/NZS 3838 1998
or any new standard that meets or exceeds those stated.
As Antares hats have ASTM F1163 with SEI its good news