Consistency between bank country, agency country and IBAN country

Summary:

Dear All

We created a bank (bank_1) with contry = RE (La Réunion).

We created a branch (branch_1) link to the bank bank_1 with county = RE (La Réunion)

We created a supplier (country = RE) and a bank account using bank_1 and branch_1 and the IBAN 'FRXXXXX'

This assocation is possible but for Oracle Fusion is this correct ?

La Réunion is an island, not a country : it is a French dept. For Oracle La Réunion is a country !

Do we have to create the bank / branch with country = RE ou FR (France). The same for the supplier.