Answer:
I know of no compliance regulations dictating who is "eligible" to sign on internal accounts. One cardinal rule, however, is that your board should be approving any authorized signers. In most larger institutions, management makes recommendations concerning where the bank or CU needs, for example, signers on their Cashier's check account. Usually there are at least two at each branch office and several at larger offices. Personnel who reconcile the cashier's check account are usually not authorized to sign on the account.