Well, one of the problems is that you cannot know what the GI for the specific fare is from KVS fare display and MPM table is not of any help here. Except for this and exact base fare in a country specific currency routing rules are useless for an IATA (or any other MPM) fare. But I am still concerned with fare rules. It looks like DotRes rules are OK [not a full text rule though], while TVN shows something totally unrelated. Any chance to tie fare rules with a specific fare in KVS?

By the way, BKK-MOW, for example, has 12 IATA fares (shown in KVS), 4 fares to each class of service with same fare basis, so it looks like the restriction not to publish same fare bases does not apply to the industry fares.

Note: fare/ routing rules also do not seem to be available for an IATA fare at all in case the airline chooses to change the first letter of the fare basis to primary booking code [this is done by an airline's request to Sabre]. Example is MOW-DEL/KE/SIF where 'Y' is forced to be replaced by 'S' by KE.