@abc.abstractmethod<EOL><INDENT>def get_bank_form_for_update(self, bank_id):<DEDENT>
return<EOL>
Gets the bank form for updating an existing bank.

        A new bank form should be requested for each update transaction.

        :param bank_id: the ``Id`` of the ``Bank``
        :type bank_id: ``osid.id.Id``
        :return: the bank form
        :rtype: ``osid.assessment.BankForm``
        :raise: ``NotFound`` -- ``bank_id`` is not found
        :raise: ``NullArgument`` -- ``bank_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred

        *compliance: mandatory -- This method must be implemented.*