The 5 hour course only qualifies for one field and lapses after a few months. You can do the full french altiport rating, which is nearer 30 hours and covers you for all altiports and glacier landings ;¬))}
Two separate ratings now. The ski / glacier rating allows you to use any snow covered altiport or altisurface (mountain landing site). It used to authorise use of the same sites when clear of snow, but that is no longer the case - you need to get the standard mountain rating.