1. Game sessions: I try to play as quickly and efficiently as possible to avoid stressing the organizers...
2. Time of day: You can play around the clock, but it comes down to common sense (I prefer to play during the day)...
3. Organizer can refuse: by providing a valid argument (referring to the mistakes of previous tournaments, etc., made by the player)...
4. Game time per match: determined by such criteria as personal workload. I have a minimum and maximum time that I can dedicate to playing (but a week should be enough)...
5. Match fixing: it's better to agree with your opponent in advance and choose a convenient time than to drag things out later...
Sincerely, SEM_56!!!