Originally Posted by Dave Noble

For fare routing rules, something like Expert Flyer is v useful

It isn't realistic to have all the routing rules for all routes for all airlines listed in one place, you just need to check the rules of the governing carrier for the rules specific to a planned journey

As far as 3rd region exceptions gp, that has been listed at https://c1.staticflickr.com/2/1681/2...94536cd6_z.jpg

As noted, Middle East and India are treated as the same continent for routing, so no issue going through the middle east to get to india. Checking on EF, QR does have a fare published for that journey