diff --git a/bicepconfig.json b/bicepconfig.json
index 7b7be46..95386d2 100644
--- a/bicepconfig.json
+++ b/bicepconfig.json
@@ -33,7 +33,7 @@
         "simplify-interpolation": { "level": "warning" },
         "simplify-json-null": { "level": "warning" },
         "use-parent-property": { "level": "warning" },
-        "use-recent-api-versions": { "level": "off" },
+        "use-recent-api-versions": { "level": "warning" },
         "use-resource-id-functions": { "level": "warning" },
         "use-resource-symbol-reference": { "level": "warning" },
         "use-safe-access": { "level": "warning" },
diff --git a/docs/adr/001-policy-assignment-enforcement-mode.md b/docs/adr/001-policy-assignment-enforcement-mode.md
new file mode 100644
index 0000000..21c295c
--- /dev/null
+++ b/docs/adr/001-policy-assignment-enforcement-mode.md
@@ -0,0 +1,49 @@
+# ADR 001: Policy Assignment Enforcement Mode (DoNotEnforce)
+
+## Status
+
+Accepted
+
+## Context
+
+The `impl/azure/landing-zone/bicep/modules/policy-assignments.bicep` module assigns the
+built-in "Allowed locations" policy definition
+(`e56962a6-4747-49cd-b67b-bf8b01975c4c`) with `enforcementMode: 'DoNotEnforce'` and
+`metadata.rolloutState: 'audit'`. Phase 33 (Azure Infra Hardening) reviewed this setting
+to confirm it is an intentional design choice rather than an unreviewed gap.
+
+The `impl/azure/landing-zone/` directory is explicitly documented (see its own README) as
+an "Azure Landing Zone (Stub)" — a reference implementation demonstrating the pattern of
+identity, network, logging, Key Vault, and policy modules working together, not a
+deployed environment bound to any real subscription, management group, or workload.
+
+## Decision
+
+Keep `enforcementMode: 'DoNotEnforce'` (audit-only) for the `allowedLocations` policy
+assignment in this stub landing zone. Do not flip to `Default` (enforcing) mode as part
+of Phase 33.
+
+This is a deliberate, reviewed exception, not an oversight: enforcing mode on a reference
+module (a) misrepresents a teaching/example artifact as hardened production guidance, and
+(b) an enforcement-mode change is a live-policy behavior change that this phase's
+constraints (no `az deployment`, validation via `bicep build`/`bicep lint` only) cannot
+safely verify end-to-end before merge.
+
+## Consequences
+
+- Any team copying this stub landing zone into a real subscription MUST explicitly
+  revisit `enforcementMode` and set it to `Default` (or remove `DoNotEnforce` entirely)
+  before treating the copied module as a production control. This ADR is the durable
+  record of that follow-up obligation.
+- No immediate change to deployed infrastructure results from this ADR, because this
+  module has never been deployed as production infrastructure (stub/reference only).
+- If this landing zone stub is ever promoted to an actively deployed reference
+  environment (e.g. a real demo subscription), enforcement mode must be reassessed at
+  that time and this ADR superseded by a new one recording that transition.
+
+## Related
+
+- `impl/azure/landing-zone/bicep/modules/policy-assignments.bicep`
+- `impl/azure/landing-zone/README.md`
+- Phase 33 context: `.planning/phases/33-azure-infra-hardening/33-CONTEXT.md` (in the
+  `PersonalRepo` root workspace, not this repository)
diff --git a/impl/azure/landing-zone/bicep/modules/identity.bicep b/impl/azure/landing-zone/bicep/modules/identity.bicep
index 26a26ef..becd986 100644
--- a/impl/azure/landing-zone/bicep/modules/identity.bicep
+++ b/impl/azure/landing-zone/bicep/modules/identity.bicep
@@ -1,7 +1,7 @@
 param location string
 param name string
 
-resource identity 'Microsoft.ManagedIdentity/userAssignedIdentities@2023-01-31' = {
+resource identity 'Microsoft.ManagedIdentity/userAssignedIdentities@2024-11-30' = {
   name: name
   location: location
   tags: {
diff --git a/impl/azure/landing-zone/bicep/modules/logging-siem.bicep b/impl/azure/landing-zone/bicep/modules/logging-siem.bicep
index f210409..20ce5f1 100644
--- a/impl/azure/landing-zone/bicep/modules/logging-siem.bicep
+++ b/impl/azure/landing-zone/bicep/modules/logging-siem.bicep
@@ -1,7 +1,7 @@
 param location string
 param name string
 
-resource workspace 'Microsoft.OperationalInsights/workspaces@2023-09-01' = {
+resource workspace 'Microsoft.OperationalInsights/workspaces@2025-02-01' = {
   name: name
   location: location
   properties: {
diff --git a/impl/azure/landing-zone/bicep/modules/network-hubspoke.bicep b/impl/azure/landing-zone/bicep/modules/network-hubspoke.bicep
index 8b4ebae..b94e411 100644
--- a/impl/azure/landing-zone/bicep/modules/network-hubspoke.bicep
+++ b/impl/azure/landing-zone/bicep/modules/network-hubspoke.bicep
@@ -1,7 +1,7 @@
 param location string
 param name string
 
-resource nsg 'Microsoft.Network/networkSecurityGroups@2024-05-01' = {
+resource nsg 'Microsoft.Network/networkSecurityGroups@2024-10-01' = {
   name: '${name}-nsg'
   location: location
   properties: {
@@ -23,7 +23,7 @@ resource nsg 'Microsoft.Network/networkSecurityGroups@2024-05-01' = {
   }
 }
 
-resource virtualNetwork 'Microsoft.Network/virtualNetworks@2024-05-01' = {
+resource virtualNetwork 'Microsoft.Network/virtualNetworks@2024-10-01' = {
   name: name
   location: location
   properties: {
diff --git a/impl/azure/landing-zone/bicep/modules/policy-assignments.bicep b/impl/azure/landing-zone/bicep/modules/policy-assignments.bicep
index 635ce08..0e365d0 100644
--- a/impl/azure/landing-zone/bicep/modules/policy-assignments.bicep
+++ b/impl/azure/landing-zone/bicep/modules/policy-assignments.bicep
@@ -1,6 +1,6 @@
 param location string
 
-resource allowedLocations 'Microsoft.Authorization/policyAssignments@2024-04-01' = {
+resource allowedLocations 'Microsoft.Authorization/policyAssignments@2025-01-01' = {
   name: guid(resourceGroup().id, 'allowed-locations')
   properties: {
     displayName: 'Allowed locations for the reference resource group'