I was going through What is a stopover? and one of the comments shared What is a stopover? talks about http://www.britishairways.com/assets/pdfs/information/legal/International-Passenger-Rules-Tariff-part-1.pdf .
While this seems to be interesting to itself, this is related only to BA. Is there a site or an online-resource where people could find such rules and regulations of different airlines at one glance or download pdf's rather than going to the airline and trying to hunt to get the required information.