George Patterson wrote in
news:GqcMe.161$zb.155@trndny04:

Bruce Hoult wrote:

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.

No. 12,500' if you exceed it for 30 minutes or 14,000' if you go over
that at all. At 15,000', passengers also have to be on oxygen. Section
91.211.

George Patterson
Give a person a fish and you feed him for a day; teach a person
to use the Internet and he won't bother you for weeks.

Almost, but not quite correct.

91.211a(1,2) says "...flight crew is PROVIDED WITH AND USES (emphasis mine)
supplemental oxygen" at the 12,500 and 14,000 foot altitudes as you
correctly noted.

91.211a(3) says "...above 15,000 feet (MSL) unless each occupant is
PROVIDED WITH supplemental oxygen." Your passengers are never required to
be USING oxygen.

Yes, it's a minor point...
-Bob Korves