diff --git a/README.md b/README.md
index e2819e58..d2a31ec2 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # ALZ
 
 [![ActionsTest-Windows-pwsh-Build](https://github.com/Azure/ALZ-PowerShell-Module/actions/workflows/wf_Windows_Core.yml/badge.svg?branch=main)](https://github.com/Azure/ALZ-PowerShell-Module/actions/workflows/wf_Windows_Core.yml)
+[![license](https://img.shields.io/badge/License-MIT-purple.svg)](LICENSE)
 
 ![Logo](./docs/ALZLogo-Small.png)
 
diff --git a/src/ALZ/Assets/alz-bicep-config/v0.13.0.config.json b/src/ALZ/Assets/alz-bicep-config/v0.13.0.config.json
index c9e64751..be475e2a 100644
--- a/src/ALZ/Assets/alz-bicep-config/v0.13.0.config.json
+++ b/src/ALZ/Assets/alz-bicep-config/v0.13.0.config.json
@@ -92,7 +92,7 @@
         },
         "Location": {
             "Type": "UserInput",
-            "Description": "Deployment location.",
+            "Description": "Deployment location. (e.g. 'uksouth')",
             "Value": "",
             "Targets": [
                 {
@@ -108,81 +108,13 @@
                     "Destination": "Parameters"
                 }
             ],
-            "AllowedValues": [
-                "asia",
-                "asiapacific",
-                "australia",
-                "australiacentral",
-                "australiacentral2",
-                "australiaeast",
-                "australiasoutheast",
-                "brazil",
-                "brazilsouth",
-                "brazilsoutheast",
-                "canada",
-                "canadacentral",
-                "canadaeast",
-                "centralindia",
-                "centralus",
-                "centraluseuap",
-                "centralusstage",
-                "eastasia",
-                "eastasiastage",
-                "eastus",
-                "eastus2",
-                "eastus2euap",
-                "eastus2stage",
-                "eastusstg",
-                "europe",
-                "france",
-                "francecentral",
-                "francesouth",
-                "germany",
-                "germanynorth",
-                "germanywestcentral",
-                "global",
-                "india",
-                "japan",
-                "japaneast",
-                "japanwest",
-                "jioindiacentral",
-                "jioindiawest",
-                "korea",
-                "koreacentral",
-                "koreasouth",
-                "northcentralus",
-                "northcentralusstage",
-                "northeurope",
-                "norway",
-                "norwayeast",
-                "norwaywest",
-                "qatarcentral",
-                "singapore",
-                "southafrica",
-                "southafricanorth",
-                "southafricawest",
-                "southcentralus",
-                "southcentralusstage",
-                "southeastasia",
-                "southindia",
-                "swedencentral",
-                "switzerland",
-                "switzerlandnorth",
-                "switzerlandwest",
-                "uaecentral",
-                "uaenorth",
-                "uksouth",
-                "ukwest",
-                "unitedstates",
-                "westcentralus",
-                "westeurope",
-                "westindia",
-                "westus",
-                "westus2",
-                "westus2stage",
-                "westus3",
-                "westusstage"
-            ]
+            "AllowedValues": {
+                "Display": false,
+                "Description": "Getting Azure deployment locations.",
+                "Type": "PSScript",
+                "Script": "Get-AzLocation | Where-Object {$_.RegionType -eq 'Physical'} | Sort-Object Location | Select-Object -ExpandProperty Location",
+                "Values": []
+            }
         },
         "Environment": {
             "Type": "UserInput",
diff --git a/src/ALZ/Private/Request-ConfigurationValue.ps1 b/src/ALZ/Private/Request-ConfigurationValue.ps1
index 5ab6cd6d..99fdfa1a 100644
--- a/src/ALZ/Private/Request-ConfigurationValue.ps1
+++ b/src/ALZ/Private/Request-ConfigurationValue.ps1
@@ -10,8 +10,15 @@ function Request-ConfigurationValue {
         [System.Boolean] $withRetries = $true
     )
 
-    $allowedValues = $configValue.AllowedValues
-    $hasAllowedValues = $null -ne $configValue.AllowedValues
+    #if the file has a script - execute it:
+    if ($null -ne $configValue.AllowedValues -and $configValue.AllowedValues.Type -eq "PSScript") {
+        Write-InformationColored $configValue.AllowedValues.Description -ForegroundColor Yellow -InformationAction Continue
+        $script = [System.Management.Automation.ScriptBlock]::Create($configValue.AllowedValues.Script)
+        $configValue.AllowedValues.Values = Invoke-Command -ScriptBlock $script
+    }
+
+    $allowedValues = $configValue.AllowedValues.Values
+    $hasAllowedValues = $null -ne $configValue.AllowedValues -and $null -ne $configValue.AllowedValues.Values -and $configValue.AllowedValues.Values.Length -gt 0
 
     $defaultValue = $configValue.DefaultValue
     $hasDefaultValue = $null -ne $configValue.DefaultValue
@@ -19,7 +26,7 @@ function Request-ConfigurationValue {
     $hasValidator = $null -ne $configValue.Valid
 
     Write-InformationColored $configValue.Description -ForegroundColor White -InformationAction Continue
-    if ($hasAllowedValues) {
+    if ($hasAllowedValues -and $configValue.AllowedValues.Display -eq $true) {
         Write-InformationColored "[allowed: $allowedValues] " -ForegroundColor Yellow -InformationAction Continue
     }
 
@@ -54,7 +61,9 @@ function Request-ConfigurationValue {
 
         $shouldRetry = $validationError -and $withRetries
     }
-    while (($hasNotSpecifiedValue -or $isDisallowedValue -or $isNotValid) -and $shouldRetry)
+    while (
+
+    ($hasNotSpecifiedValue -or $isDisallowedValue -or $isNotValid) -and $shouldRetry)
 
     Write-InformationColored "" -InformationAction Continue
 }
diff --git a/src/Tests/Unit/Private/Request-ConfigurationValue.Tests.ps1 b/src/Tests/Unit/Private/Request-ConfigurationValue.Tests.ps1
index cf34c51a..44ec0221 100644
--- a/src/Tests/Unit/Private/Request-ConfigurationValue.Tests.ps1
+++ b/src/Tests/Unit/Private/Request-ConfigurationValue.Tests.ps1
@@ -37,7 +37,7 @@ InModuleScope 'ALZ' {
 
                 Request-ConfigurationValue -configName "prefix" -configValue $configValue
 
-                Assert-MockCalled -CommandName Write-InformationColored -Times 3
+                Should -Invoke -CommandName Write-InformationColored -Times 4 -Exactly
 
                 $configValue.Value | Should -BeExactly "user input value"
             }
@@ -56,7 +56,7 @@ InModuleScope 'ALZ' {
 
                 Request-ConfigurationValue -configName "prefix" -configValue $configValue
 
-                Assert-MockCalled -CommandName Write-InformationColored -Times 3
+                Should -Invoke -CommandName Write-InformationColored -Times 4 -Exactly
 
                 $configValue.Value | Should -BeExactly "alz"
             }
@@ -103,13 +103,61 @@ InModuleScope 'ALZ' {
                     Description   = "The prefix that will be added to all resources created by this deployment."
                     Names         = @("parTopLevelManagementGroupPrefix", "parCompanyPrefix")
                     Value         = ""
-                    AllowedValues = @("alz", "slz")
+                    AllowedValues = @{
+                        Values = @("alz", "slz")
+                    }
                 }
                 Request-ConfigurationValue -configName "prefix" -configValue $configValue -withRetries $false
 
                 Should -Invoke -CommandName Write-InformationColored -ParameterFilter { $ForegroundColor -eq "Red" } -Scope It
                 $configValue.Value | Should -BeExactly ""
             }
+
+            It 'Prompt user with a calculated list of AllowedValues' {
+                Mock -CommandName Read-Host -MockWith {
+                    "l"
+                }
+
+                $configValue = @{
+                    Description   = "The prefix that will be added to all resources created by this deployment."
+                    Names         = @("parTopLevelManagementGroupPrefix", "parCompanyPrefix")
+                    Value         = ""
+                    AllowedValues = @{
+                        Type = "PSScript"
+                        Values = @()
+                        Script = '"h e l l o" -split " "'
+                        Display = $true
+                        Description = "A collection of values returned by PS Script"
+                    }
+                }
+                Request-ConfigurationValue -configName "calculated" -configValue $configValue -withRetries $false
+
+                Should -Invoke -CommandName Write-InformationColored -Times 6 -Exactly
+                $configValue.Value | Should -BeExactly "l"
+            }
+
+            It 'Do not display the calculated list of AllowedValues if Display is false' {
+                Mock -CommandName Read-Host -MockWith {
+                    "l"
+                }
+
+                $configValue = @{
+                    Description   = "The prefix that will be added to all resources created by this deployment."
+                    Names         = @("parTopLevelManagementGroupPrefix", "parCompanyPrefix")
+                    Value         = ""
+                    AllowedValues = @{
+                        Type = "PSScript"
+                        Values = @()
+                        Script = '"h e l l o" -split " "'
+                        Display = $false
+                        Description = "A collection of values returned by PS Script"
+                    }
+                }
+                Request-ConfigurationValue -configName "calculated" -configValue $configValue -withRetries $false
+
+                Should -Invoke -CommandName Write-InformationColored -Times 5 -Exactly
+                $configValue.Value | Should -BeExactly "l"
+            }
         }
     }
 }