For Business Class Regional Service, what code would you use to book wheelchair access?

When booking wheelchair access for Business Class Regional Service on Amtrak, the appropriate code to use is ZY. This code is specifically designated for reservations that require assistance, including wheelchair access. It is important for ensuring that the necessary accommodations are arranged to provide a safe and comfortable experience for passengers with mobility challenges.

The other codes, while they may relate to other services or categories in Amtrak's reservation system, do not specifically indicate the need for wheelchair access. Understanding the purpose of each code is essential in ensuring that passengers receive the services and accommodations they require when traveling.