How to Restrict the expense type on the basis of DFF on expense creation page

Summary:

We have 2 expense type (Mileage with Car Allowance and Mileage without Car Allowance) and any one expense type should be visible to employee based on the DFF (Car Allowance). For example, if the DFF value is "Yes" then the employee should be able to see only the expense type "Mileage with Car Allowance" along with other expense types.

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Version (include the version you are using, if applicable):

Oracle Fusion R13

Code Snippet (add any code snippets that support your topic, if applicable):