Which option governs the order in which the search rules query the local zone versus...

 The priority number governs the order in which the search rules query the local zone versus neighbored Expressways. The priority number is a value between 1 and 1000 that is assigned to each search rule. The lower the priority number, the higher the precedence of the search rule. The Expressway evaluates the search rules in ascending order of priority numbers, and stops when it finds a match. The priority number determines which zone (local or neighbor) is searched first for a given destination alias123 References := 1Cisco Expressway Administrator Guide (X14.0) - Search Rules 2Cisco Expressway-E and Expressway-C Basic Configuration Deployment Guide (X14.0) - Routing Configuration 3Concept of Zones Demystified On Cisco Expressway Series