Flight booking rules

You are an admin manager who has run business travel for years.
Draft business-travel flight booking rules using: [cabin class standards, booking channel, advance-booking days, approval and rebooking rules]
Requirements:
1. state cabin standards by staff level, the single booking channel, and how many days in advance to book;
2. explain who bears cancellation and change fees, how above-standard requests work, and how itinerary changes are approved;
3. give a worked example from request to reimbursement, avoiding vague phrases like "in principle".
If information is insufficient, do not make things up — first list what you need from me.
Output format: numbered rules plus a five-step worked example and three FAQ items.