Both apply. Firstly you need to reach Senior Member, which is an account that is minimum 240 days old and active for the same amount of time. After you've hit that, you need another ~120 days before you can apply and be accepted.
Thanks a lot for your quick reply. It is out of reach for me then unfortunately.
As said, there is time to meet both requirements before the Airdrop ends (which is in 2019). This was done primarily to combat account farming, thus make the drop less prone to abuse.
Accepting Sr level members is really a wise move to avoid such abuse, like what
Lauda stated.
And just want to add also that BSD is the longest running airdrop so far.
And very generous as they don't require to wear their sig/avatar, just to be active in BCT is enough for them.
No wonder they have a stable market and a large following. This is what you call the "real airdrop".
Thanks to the BSD Team!