So to answer the question, i'm not certain if you are inquiring about Airlines policy or government visa policy....

If its the former, best thing to do is call QATAR AIRWAYS and ask them.

If it's the latter, then maybe there's a government agency you can ask? When my daughter was born (here in Doha), she didn't travel till she was 6 months old, but we were told the law was that she had to have a residency Visa within a month of being born....so by the time she travelled she had it.

Hope that helps somewhat, and good luck.

Stay safe all.

Perfection does not exist. The question therefore, is: what level of imperfection are we willing to settle for?