You can buy redemption code & key card subscription for your son, as he is another state, in case he is another country then it needs to be purchased from an Adobe ID of that country & that country's store with country's currency.
This would require that my son access my Amazon account and would be able
to make purchases .Once he had the Amazon password needed to download the
software. Also, this also fails to take into account that Adobe is offering
a special rate to those of us with past versions. Why doesn't Adobe deal
with this directly and offer a means to purchase gift subscriptions within
it's own system. Going outside in most case raises issues with pirating
software issues and log on problems with Adobe.
My son lives in the same Country. I just wanted to do a gift subscription
for him, where he wouldn't gain access to the account used to pay for it.
It seems it would be one way for Adobe to boost sales of their Creative
Cloud and introduce a new generation to their software.