Mileage Expense Submission without Spend Authorization when Budget Control is Set to Reserved Funds

Summary:

Our organization uses Oracle Fusion Expense Management and has configured budget control for Spend Authorizations (Travel Authorizations) to utilize 'Reserved Funds.' We have a specific requirement where Mileage expenses are policy-exempt and should be allowed for submission on an Expense Report without a preceding Spend Authorization.

We are concerned that if the overall budget control setting uses 'Reserved Funds,' the system might still prevent the submission of Mileage expenses if an authorization is missing or if the Mileage expense is treated the same as other expense categories that require reserved funds.
Could you please confirm the recommended configuration approach or any specific setup required to allow employees to submit Mileage expenses (and be reimbursed)