(1) "Registration number" means the unified business identifier number (UBI) assigned to the registered seller of travel.

(2) "Main office" means the first registered business location for a seller of travel.

(3) "Branch office" means each additional business location for a seller of travel after the first location has been registered.

(4) "Other approved account" means (a) bank administered account; (b) account pursuant to other state law; (c) checking account; (d) savings account; (e) an account individually approved of by the department.