ProVobis,
I totally disagree with your interpretation of the latin. There would never have been the need to adopt the words “celebratio versus populum peragi possit” unless specific clarification was needed to celebrate facing the people. The only requisite would have been to state that the altar be free-standing, so that incensing could be facilitated. You two are stretching for the moon to make your point, and it shows up as being argumentative. There are just too many other places where the posture has been clearly demonstrated as lawful, adviseable, preferred, and theologically correct.