Salary Basis Defaulting using redwood business rules.

Salary basis defaulting business rules:
As suggested by oracle, we have created the business rules for defaulting salary basis in a same rule for different instances (Say DEV1, DEV10 & DEV14).
Here, we created a rule in DEV1(CA Annual Salary basis) and in the IF/ELSE we add the different Instance along with the URL in the condition. And in the values, we default the values (CA Annual basis/ CA hourly basis) based on the condition.
Business Rule.
Going forward we will not have access to the instance to get the salary basis ID. In that case how we can proceed further.