Domestic only F/O's in the US do in fact have a type rating with an SIC limitation. We all had to file the paperwork to add these to our licenses several years back. No additional training was required however, as the existing airline training curricula retroactively satisfied ICAO's requirements for issuance of an SIC type rating.
Most international F/O's in the US do in fact have full PIC type ratings; this is done so that the captain can have a break on longer flights whilst two F/Os remain on the flight deck, the senior most of whom is delegated temporary command.
Last edited by RandomPerson8008; 17th May 2012 at 20:06.