If you are only renewing your registration then you do not need an appointment but for anything else you will need to schedule an appointment.
Yes you do need an appointment
Yes I believe so but they are quick and efficient and if you show up early and other appointments haven't arrived yet they try to squeeze you in and get you out as quickly as possible. I had an appointment for 12:30 showed up around 11:45 11:50 and got in and out before 12:30
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