I think B200drvr covered it. Air Law plus a flight check will validate your license. To be a bit more precise though its a flight check in every class/type you want validated. ie. Multi engine land, Single engine sea, rotorcraft/helicopter. it gets expensive. If you only need a certain rating just take the flight check for that one. Thats to say if your on vacation and want to fly a C 182, just get validated for Single engine land.
Employment is a whole different story.