Accounting codes can now be assigned via Group allocation. To achieve this you must create a new policy that enables accounting codes, the account code option must be set to "Pop-up a list of accounting codes associated with group".
The policy must then be assigned to a group to enable the account code selection against the speicific group.
Users who are members of this group will be required to select an accounting code prior to print job submission.
Please see detailed instructions on how to achieve this below.