The Resolution was presented during an emergency session. It was passed unanimously within an hour. Though it is not explicitly stated that emergency sessions only need hour-long voting sessions, the hour-long period before enforcement implies that this was the intention of the founders.
As for Sikandar's objections that Breshik is not a member, no official process was even hinted at that would prevent a nation from unilaterally joining the AN.
Therefore, the Resolution passes.
The is a official process all member states must go through to be Admitted to the AN, read Article 8 you fucking idiot -YugoTexas