CalPERS - Employee paid employer contribution amounts

An employee Bargaining Unit has agreed to pay x% of the mandatory employer contribution to CalPERS.  The mandatory employee contribution amount is y% so the employee will pay a total of z%.  What is the best way to set this up?

• Payroll
• California
• CA myCalPERS Payroll Contribution File 
• CalPERS Payroll Contribution Reporting

Mandatory employer contribution amounts are not included in the CalPERS Payroll Contribution File. 

Set up a new employee paid deduction code in the Deduction Master to collect the x%.  Make sure Payroll Exceptions are also setup, and identical to the existing y% employee paid deduction. 

As the x% is a mandatory employer contribution amount, it should not be included in the CalPERS Payroll Contribution File.  A new code means it already does not exist on the CalPERS Generate define so no additional changes are necessary in order to report accurately.