diff --git a/extensions/openpower-pels/registry/README.md b/extensions/openpower-pels/registry/README.md
index f1c90f9..89d4578 100644
--- a/extensions/openpower-pels/registry/README.md
+++ b/extensions/openpower-pels/registry/README.md
@@ -377,6 +377,29 @@
 - Symbolic FRU: symbolic_fru
 - Procedure: maint_procedure
 
+#### Symbolic FRU callouts with dynamic trusted location codes
+
+A special case is when one wants to use a symbolic FRU callout with a trusted
+location code, but the location code to use isn\'t known until runtime. This
+means it can\'t be specified using the 'LocCode' key in the registry.
+
+In this case, one should use the 'SymbolicFRUTrusted' key along with the
+'UseInventoryLocCode' key, and then pass in the inventory item that has the
+desired location code using the 'CALLOUT_INVENTORY_PATH' entry inside of the
+AdditionalData property.  The code will then look up the location code for that
+passed in inventory FRU and place it in the symbolic FRU callout.  The normal
+FRU callout with that inventory item will not be created.  The symbolic FRU
+must be the first callout in the registry for this to work.
+
+```
+{
+
+    "Priority": "high",
+    "SymbolicFRUTrusted": "AIR_MOVR",
+    "UseInventoryLocCode": true
+}
+```
+
 ## Modifying and Testing
 
 The general process for adding new entries to the message registry is:
diff --git a/extensions/openpower-pels/registry/schema/schema.json b/extensions/openpower-pels/registry/schema/schema.json
index 50c2d2d..e122db4 100644
--- a/extensions/openpower-pels/registry/schema/schema.json
+++ b/extensions/openpower-pels/registry/schema/schema.json
@@ -454,6 +454,12 @@
             "enum": ["no_vpd_for_fru", "bmc_code"]
         },
 
+        "useInventoryLocCode":
+        {
+            "description": "Used along with SymbolicFRUTrusted to specify that the location code to use with the symbolic FRU is to be taken from the passed in CALLOUT_INVENTORY_PATH callout rather than being specified with LocCode.",
+            "type": "boolean"
+        },
+
         "calloutList":
         {
             "description": "The list of FRU callouts to add to a PEL.  If just LocCode is specified, it is a normal hardware FRU callout.  If Procedure is specified, it is a procedure callout.  If SymbolicFRU or SymbolicFRUTrusted are specified, it is a Symbolic FRU callout.  SymbolicFRUTrusted also requires LocCode.",
@@ -467,7 +473,8 @@
                     "LocCode": {"$ref": "#/definitions/locationCode" },
                     "SymbolicFRU": {"$ref": "#/definitions/symbolicFRU" },
                     "SymbolicFRUTrusted": {"$ref": "#/definitions/symbolicFRUTrusted" },
-                    "Procedure": {"$ref": "#/definitions/procedure" }
+                    "Procedure": {"$ref": "#/definitions/procedure" },
+                    "UseInventoryLocCode": {"$ref": "#/definitions/useInventoryLocCode" }
                 },
                 "additionalProperties": false,
                 "required": ["Priority"],
@@ -480,7 +487,8 @@
                             { "required": ["LocCode"] },
                             { "not": { "required": ["SymbolicFRU"] }},
                             { "not": { "required": ["SymbolicFRUTrusted"] }},
-                            { "not": { "required": ["Procedure"] }}
+                            { "not": { "required": ["Procedure"] }},
+                            { "not": { "required": ["UseInventoryLocCode"] }}
                         ]
                     },
                     {
@@ -489,16 +497,28 @@
                         [
                             { "required": ["SymbolicFRU"] },
                             { "not": { "required": ["SymbolicFRUTrusted"] }},
-                            { "not": { "required": ["Procedure"] }}
+                            { "not": { "required": ["Procedure"] }},
+                            { "not": { "required": ["UseInventoryLocCode"] }}
                         ]
                     },
 
                     {
                         "allOf":
                         [
-                            { "required": ["SymbolicFRUTrusted", "LocationCode"] },
+                            { "required": ["SymbolicFRUTrusted", "LocCode"] },
                             { "not": { "required": ["SymbolicFRU"] }},
-                            { "not": { "required": ["Procedure"] }}
+                            { "not": { "required": ["Procedure"] }},
+                            { "not": { "required": ["UseInventoryLocCode"] }}
+                        ]
+                    },
+
+                    {
+                        "allOf":
+                        [
+                            { "required": ["SymbolicFRUTrusted", "UseInventoryLocCode"] },
+                            { "not": { "required": ["SymbolicFRU"] }},
+                            { "not": { "required": ["Procedure"] }},
+                            { "not": { "required": ["LocCode"] }}
                         ]
                     },
 
@@ -508,7 +528,8 @@
                             { "required": ["Procedure"] },
                             { "not": { "required": ["SymbolicFRU"] }},
                             { "not": { "required": ["SymbolicFRUTrusted"] }},
-                            { "not": { "required": ["LocCode"] }}
+                            { "not": { "required": ["LocCode"] }},
+                            { "not": { "required": ["UseInventoryLocCode"] }}
                         ]
                     }
                 ]