I would not use a default value for CPR Due Date. I would instead use rules. I would put the same rules on CPR Completed and on the Location field. The rules would have conditions. If the Location = A or B, and CPR Completed is not blank, set Due Date to CPR Completed + 2 years. If the location is not equal to A and not equal to B, and CPR Completed is not blank, set Due Date to CPR Completed + 3 years. Because the user changing the CPR Completed field OR the Location field would impact the value of the Due Date, you need to have the same rules on both fields. Remove the default value for CPR Completed entirely.
Hilary Stoupa
