2. Can anyone cite the reference for the answer "...Past the Final Approach Fix and runway in sight." It sounds reasonable.
AIM Sec 4.5 alludes to it in several ways, but makes no absolute, direct statement. An instrument approach, by definition, is designed to get you into a position to land, at which you take over visually (Cat II/III excepted). I limit it to "Past the Final Approach Fix" because you are not generally looking for the runway until after the FAF, and ATC normally expects you to adhere to the procedure through the FAF.