Utilizing Account rule priority or defining a condition "If mapping not found in previous rule"

Summary: Need to derive Location segment value based on 3 mapping sets. I want the create accounting program to go to rule 2 if no mapping is found in rule 1, and so on

Content (please ensure you mask any confidential information):

• Priority 1 - Derive Location based on Legacy Segment 2 & 3
• Priority 2 - Derive Location based on Legacy Segment 2 & 4
• Priority 3 - Derive Location based on Legacy Segment 2 only

I want the create accounting program to go to rule 2 if no mapping is found in rule 1, and so on

The individual segment values applicable for all the mapping sets are not exclusive. i.e., Same value for segment 2 might be present in set 1 as well as set 2 as well as set 3.