NGA is semi-traditional, so I get confused when I go to schools that follow more strict traditions. I've been to some where students still aren't allowed to stand, except when performing techniques. Lots of knee-walking (shikkoo) onto and off of the mats, between techniques, etc.
Our sequence for a formal promotion:
- Class lines up to bow in as usual (usually done at beginning of class) in a formal, kneeling bow.
- Class stays kneeling, student(s) to be promoted move forward to kneel in front of instructor (who is also kneeling throughout).
- Instructor gives some brief words about what the next rank's expectations are, hands over the belt and certificate.
- Instructor and promoted students repeat formal bow.
- Promoted students return to the line, kneel, put new stuff to their right.
- (Some instructors do another formal bow here - I start getting impatient.)
- Class moves to warm-ups (promoted students quickly change belts, put old belts and certificates with their clothes).
Most NGA dojos also use a nafuda (name board - place where all the students' names hang, showing rank/seniority). Student gets to move their name on the nafuda when they complete all the requirements (tests, etc.) for the next rank. If the school is part of an association (NGAA, NGAF, etc.), the certificate will take a couple of weeks to arrive. I don't do certificates (yet, might change my mind on that), so I don't have that delay (and don't have a nafuda - not my space).