Originally Posted by Taildragger86

The other day I was flying into iad and told to intercept the localizer close to 30 miles out. I don't fly into there that often. I simply cleaned up the fms, and intercepted in white needles. I figured that intercepting in green would have caused the autopilot to constantly turn back and forth chasing the localizer because we were so far out. My captain told me that technically we have to be in green needles in order to be legal because our instructions were "intercept the localizer." Anyone have any thoughts on the best way to do this next time it comes up with a fed on board?