All our 744s (incl. -ERs), all our 767-300s, and our later 737-800s allowed either loc or g/s to capture first.
What happens on aircraft types which inhibit G/S capture prior to Loc capture and the Loc ground station is inop? Surely being able to use one part of the ILS is better than none?
Also, on some aircraft, in flight, TOGA is armed when G/S is captured. What happens to aircraft which won't let you arm TOGA because of this "Loc first" rule?