Etiquette for optional rules vary from group to group, but the rulebook says that they may be used “if all players agree”.
Just to be clear, this is only an optional rule in Classic. In Revised, it’s a standard rule.
Combat move. Could an infantry move 1, load onto a transport, then offload another place.
Norway is undefended and I’d really like to use my Eastern Canada transport and my Western Canada infantry. :-D
No. Units may NOT move before loading onto a TRN, nor after offloading.
That applies for tanks as well right?
Correct. It applies to all land units.