Preparing for the Certified Burn Manager exam — field experience documentation requirements unclear

I've been working in prescribed fire operations for about five years now, mostly in the Southeast, and I'm finally looking at the CBM certification. The application process mentions documented field experience but I can't find a clear breakdown of exactly how many hours or what type of burns qualify. Has anyone gone through the process recently and can clarify what documentation they actually required?

From what I've gathered from colleagues, the written exam covers fire behavior, smoke management, and operational planning pretty heavily. I'm less worried about the practical knowledge side since I've run maybe 80–90 burns over the past five years, but the regulatory and liability sections of the exam are where I feel less confident. Those aren't topics that come up in day-to-day field work.

I've set aside about 6 weeks to study before my scheduled exam date. Planning on 1 hour per day during the week and using weekends to go through case studies on smoke management planning and air quality compliance. The smoke management piece seems like it's weighted pretty heavily based on the exam objectives I've seen.

Anyone know if the exam is mostly multiple choice or does it include scenario-based questions? And roughly what percentage score do you need to pass? I haven't been able to find that number anywhere in the official materials.