The sole purpose of this form is to authorize the above named representative to complete the transaction indicated. SAN ANTONIO TEXAS 78283-3966.PHONE: (210) 207-3677. Zoning Verification Letters. A Zoning Verification Letter is an optional service that identifies a property's current zoning, based on the zoning ordinance. The Edwards Aquifer Authority manages the San Antonio segment of the Balcones Fault Zone. The Edwards Aquifer Authority manages the San Antonio segment of the Balcones Fault Zone. For example: a resubmittal affecting submittal 1103010 would be number 11A03010. Doctor of Medicine (M.D.). See the Code Comparative Table for a complete derivation.