The Commodity Futures Trading Commission has issued an order approving a non-proprietary cross-margining program between ICE Clear US, Inc. (ICE Clear) and The Options Clearing Corporation (OCC). Under the program, which is similar to the one in place between the Chicago Mercantile Exchange and the OCC, “Market Professionals” – i.e., market makers, specialists or registered traders as defined by the OCC – that clear through participating firms that are members of ICE Clear and OCC will be permitted to cross-margin their positions in futures and options based on Russell Indexes.

http://www.cftc.gov/newsroom/generalpressreleases/2008/pr5463-08.html

https://www.theice.com/clearing_cross_margin.jhtml