The SOP Bullethead outlines is the norm for Cat 2/3a and 3b ND ILSs.
It may be the norm in your airline, but it isn't THE NORM (not in Europe, anyway).
Autolands to Cat 1 minimas 'for real' are perfectly legal as long as the rwy is company approved for autolands and the crew remain alert for LOC/GS deviations caused by interference from aircraft/vehicles inside what would be a protected area if real LVPs were in force for Cat 2/3 ops.
They may be "legal" but it's a really stupid idea, and most airlines ban it (again, in Europe at any rate). You really want to be messing with a sudden deviation say, during the approach to the flare? I've seen that happen once (during a training sortie), the aircraft very nearly left the runway. Not smart.
More to the point, Cat II/III approaches can only be made to Cat II/III runways (ie runways for which a Cat II/III approach is published), so no, you can't legally do an autoland to a Cat I (only) runway.