I also contacted my travel agent and they told me there is no such change. Also I work for TD and I deal with visa closely and there is no such change request issued by visa international....airlines cannot make that an issue unless its a rule made by visa international.
so no one should stressed out as I just booked 4 return tickets for PIA on my dad's card and it has gone through. Its illegal for an airline to impliment this rule as a consumer I have full right to use my visa the way I like and book anyone's ticket on it. for example if I am employer I can even do it for my employee and send them on a trip. However if I am using someone visa without thier authrization then it becomes fraud and your financial instituation will deal with puting dispute on it but airline should not have any conern with it waht so ever.
I hope this helps. If you calling PIA call centre and thinking you will get acurate info then sorry to say but that wont happen.