Originally Posted by KVS
I know it's kinda late now, but to answer your question, yes, there is an equivalent rule, it's called
Rule 80 and it applies to all IATA airlines (including BA). You can see a sample text of Rule 80 published by AS at
http://www.alaskaair.com/www2/compan..._section1H.asp. Having read the text of BA's version of Rule 80 (they call it
"Involuntary Reroutings"), I can say that it is very similar to the one above.
Most airlines, however, don't like to mention it and you will see that BA (just like most other airlines) makes no reference to it (or its principles) in the terms and conditions published on its website.
If it is not in the published rules, then it does not form part of the contract and you have no right as such. It is merely an option at the discretion of BA and subject to your agreement. Your rights are what is published in the T&Cs, viz. 1) transportation on BA on the first of their flight with availability in the relevant class of travel or
2) transportation at a later date within the period of valiidity of the ticket
3) refund.
Incidentally, the extract from AS's T&Cs that you provided a link to would seem to suggest that, for AS too, carriage on another carrier is at carrier's option, not a right of the pax.
Pax have a right to re-routing, under the EU Reg, 'under comparable conditions to their final destination at the earliest opportunity'. It is not clear, however, whether 'at the earliest opportunity' means at the earliest opportunity on any carrier or at the earliest opportunity on same carrier.