Dues for the National Association of Postmasters of the United States (NAPUS), the National League of Postmasters (the League), and the National Alliance of Postal Employees are deducted in the pay period that includes the first day in a calendar month and are reflected in the salary check for that pay period. Dues for all other labor organizations and for the National Association of Postal Supervisors (NAPS) are withheld each pay period.