Depends on which resolution your are talking about.
The veto power in the UN allows its five permanent members on the Security Council (USA, Russia, UK, France and China) to say no to any resolution they disagree with. The veto power once used will not allow a resolution to pass, simply based on one no vote by the permanent members.
9votes, including those of permanent members
They have power of Veto - all other non-permanent members of the Security Council just vote on resolutions, just members of the General Assembly just vote on GA resolutions - no SC Resolution can pass without Positive or Abstentions from the P5.
You can pass through security at the designated time on your boarding pass.
Tonkin gulf Resolution
In order to pass a resolution in the General Assembly, only a majority is necessary. These are mere recommendations however. For the truly powerful resolutions, the Security Council must issue them. In this case, a majority of nine out of 15 is necessary, and affirmative votes or abstentions from all the permanent members.
1908
You have to apply to your local council.
Yes, you can go straight to security if you have your boarding pass.
If you are referring to the General Assembly of the United Nations, then a simple majority is all that is required to pass a resolution. The U.N. does not have "bills", because they have no force of law.
Yes, you can use a mobile boarding pass at security checkpoints.