There's no need to be flippant, I know what the word imply means. The poster was not helping the OP at all and was only confusing matters. What I said was correct and backed up by the TfL CoC so I don't see why there's any need for conflict? It seems that instead of answer the OP's question with a clear, succint answer, there's a trend where it must be proved that the rules are unfair, illegal etc. open encouragement to breach the rules and see the TOC in court if the rule is enforced. I certainly don't think that's very helpful at all.
Sorry if I wasn't clear enough. What I was trying to say is that
to me (and I expect many people) the wording seems to apply to PAYG users only. I appreciate the CoC requires users to touch in and out even when using a Travelcard, but it's not obvious that this is a requirement from reading most TfL literature (I certainly didn't know this before this thread), and most Travelcard users don't touch in/out if not necessary with no ill effects.
I'm not trying to rally against the rules, merely pointing out that it's not clear that touching in/out with a TC is a requirement (without reading all the T&Cs, which few will realistically do), especially when everything seems to work fine without so doing.
So the answer to the OP's question is basically: The customer
is required to touch in and out for every journey. However, they won't have any trouble if they are checked.*
* I'd be interested to hear if anyone has had trouble in this situation. I've certainly been checked on buses having not touched in with no problems - not on LU/NR though.
It's also better for the user if their plans change en route, as if they decide to travel beyond the validity of their TC they'll be charged correctly and not subject to an Exit Charge at the other end.
Wouldn't the charge be the same whether they had an OEP or not? Exiting at a Z6 station with a Z1-3 TC, having not touched in, would result in the correct extension fare being charged would it not? (Sure this is how things used to work anyway).
Having to go to a TVM or (in the case of stations with no Oyster facilities) potentially some distance to an Oyster shop takes away the convenience of the system. Maybe a good solution would be to have Oyster readers (like the pink ones) on all stations (behind the barriers) which could be touched to add an OEP without any hassle.