How to make daily timecard school/costcenter mandatory field using Fast Formula TER

Summary:

I have a requirement in Time & Labor TER Fast Formula to trigger error message if school and cost center name is not given as mandatory for payroll entries but not the absence entries.

For reference please see the below example:

in the above ss, Error message should prevent timecard submission since School name for the pay code – “Regular Pay-Replacement Work” is left blank. 

In the above ss, Employee should be able to submit the timecard without any error notification since only absence row’s School Name is blank.