It is what your e-ticket states, not what MMB states. The BA ticketed allowance is 1x23kg. The BA baggage website clearly states the additional allowance for BA Silver is for BA flights only. It is well known that MMB is often wrong with baggage, lounge access, etc.
It is not an 'undocumented' QF allowance, they have seemingly waived their stated policy allowance and granted you an exception.
You are confusing yourself. The DOT rule is simple, first carrier allowance applies. IATA Resolution 302 includes MSC.
However in your case DOT does not apply.
Hey Nux....well you have "assumed" my e-ticket says 1X23Kg....it does not, my ticket says :
Flight number BA1447
From Edinburgh To Heathrow (London) Terminal 5
Operated by British Airways
Checked baggage Adults and children: 2 bags at 23kg (51lbs) per bag per passenger
You may be charged for extra or overweight bags.
Flight number BA0027
From Heathrow (London) Terminal 5 To Hong Kong Terminal 1
Operated by British Airways
Checked baggage Adults and children: 2 bags at 23kg (51lbs) per bag per passenger
You may be charged for extra or overweight bags.
Flight number BA7410
From Hong Kong Terminal 1 To Melbourne Terminal 2
Operated by QANTAS AIRWAYS
Booking status Confirmed
Checked baggage per passenger Adults and children: 1 bag (weight restrictions apply)
You may be charged for extra or overweight bags.
So I have "assumed" I will get the 2 X 23kg when checking in as there are no stop overs. However when talking to BA, they are "not sure" as there is Qantas metal in there but all BA flight numbers.
In relation to the Qantas call, The CS person actually said "Qantas has a policy that we will consider this booking a "piece" booking so will apply a piece rule. BUt as you are sapphire we allow 2 pieces for OW Sapphire members as per the Qantas policy". This was a quote from them.
Sorry JimOZ for hijacking your thread. I just find it very frustrating that baggage rules just don't seem clear, across lots of situation.