diff --git a/cloud/dev/scripts/relay-same-cap-script-census.test.mjs b/cloud/dev/scripts/relay-same-cap-script-census.test.mjs
index 743aef7fc2d..7d5e4fee73e 100644
--- a/cloud/dev/scripts/relay-same-cap-script-census.test.mjs
+++ b/cloud/dev/scripts/relay-same-cap-script-census.test.mjs
@@ -179,9 +179,10 @@ describe('same-cap roll scripts accept every same-cap cell', () => {
 
   it('validates a correct plan for every wave cell at that cell\'s rehome protocol', () => {
     for (const cellId of SAME_CAP_CELLS) {
-      const [region, cap] = resolveCellShape(cellId).stdout.trim().split(' ')
+      const [, cap] = resolveCellShape(cellId).stdout.trim().split(' ')
       const protocol = REHOME_SOURCE_CELLS.has(cellId) ? 1 : 0
-      assert.equal(protocol, region === 'us-central1' ? 1 : 0, cellId)
+      // Every reviewed serving cell carries rehome trust now, in either region.
+      assert.equal(protocol, 1, cellId)
       const config = {
         mode: 'same-cap-cell',
         cellId,
@@ -211,6 +212,29 @@ describe('same-cap roll scripts accept every same-cap cell', () => {
     }
   })
 
+  it('validates a protocol-0 plan for a cell outside the rehome source list', () => {
+    const cellId = 'production-gce-c17'
+    assert.equal(REHOME_SOURCE_CELLS.has(cellId), false)
+    const config = {
+      mode: 'same-cap-cell',
+      cellId,
+      hardCap: 1000,
+      unobservedBound: 60,
+      image: TARGET_IMAGE,
+      rollbackImage: ROLLBACK_IMAGE,
+      rehomeDirectorServiceAccount: DIRECTOR_IDENTITY,
+      rehomeAudience: AUDIENCE,
+      regionalRehomeProtocol: '0'
+    }
+    const plan = rollPlan({ cellId, cap: 1000, protocol: 0 })
+    assert.deepEqual(validateCapacityPlan(plan, config), { mode: 'same-cap-cell', changes: 2 })
+    // Protocol 1 must reject a plan with no rehome lines, or the absent-line rule decides nothing.
+    assert.throws(
+      () => validateCapacityPlan(plan, { ...config, regionalRehomeProtocol: '1' }),
+      /reviewed image and capacity/
+    )
+  })
+
   it('leaves the US-only capacity job on the default allowlist', () => {
     assert.doesNotMatch(capacityWorkflow, /--approved-cells/)
   })
diff --git a/cloud/infra/terraform/environments/production.tfvars b/cloud/infra/terraform/environments/production.tfvars
index 8e442c75900..e1522b3827e 100644
--- a/cloud/infra/terraform/environments/production.tfvars
+++ b/cloud/infra/terraform/environments/production.tfvars
@@ -402,7 +402,11 @@ relay_region_rehome_source_cell_ids = [
   "production-gce-c23",
   "production-gce-c24",
   "production-gce-c25",
-  "production-gce-c26"
+  "production-gce-c26",
+  # Asia cells carry the same trust so mis-homed hosts can be drained back off them.
+  "production-gce-c27",
+  "production-gce-c28",
+  "production-gce-c29"
 ]
 
 # Slack #orca-relay-alerts, created out of band on 2026-08-05. Declared here because an apply
diff --git a/cloud/infra/terraform/relay-gce-cells.tf b/cloud/infra/terraform/relay-gce-cells.tf
index a4505ba2e37..5023b7e1d50 100644
--- a/cloud/infra/terraform/relay-gce-cells.tf
+++ b/cloud/infra/terraform/relay-gce-cells.tf
@@ -82,14 +82,15 @@ check "relay_gce_fixed_one_topology" {
 
   assert {
     condition = alltrue([
+      # Region is not asserted here: the director's own rehome source and target predicates
+      # own eligibility, so this pins only cell shape.
       for cell_id in var.relay_region_rehome_source_cell_ids : try(
-        var.relay_gce_cells[cell_id].region == var.region &&
         var.relay_gce_cells[cell_id].connection_hard_cap != null &&
         !contains(var.relay_gce_fenced_cells, cell_id),
         false
       )
     ])
-    error_message = "Regional rehome sources must be configured, unfenced primary-region GCE cells with explicit connection limits."
+    error_message = "Regional rehome sources must be configured, unfenced GCE cells with explicit connection limits."
   }
 
   assert {
diff --git a/cloud/infra/terraform/variables.tf b/cloud/infra/terraform/variables.tf
index 91f67e8ebe0..57d73fe75b4 100644
--- a/cloud/infra/terraform/variables.tf
+++ b/cloud/infra/terraform/variables.tf
@@ -245,7 +245,7 @@ variable "relay_regional_placement_enabled" {
 
 variable "relay_region_rehome_source_cell_ids" {
   type        = set(string)
-  description = "Reviewed US Relay cells allowed to advertise and accept the regional rehome source protocol."
+  description = "Reviewed Relay cells, in any configured region, allowed to advertise and accept the regional rehome source protocol."
   default     = []
 }