diff --git a/config/offices/office-24-opening-journal.v1.json b/config/offices/office-24-opening-journal.v1.json
index b42e95e..9bd7676 100644
--- a/config/offices/office-24-opening-journal.v1.json
+++ b/config/offices/office-24-opening-journal.v1.json
@@ -1,12 +1,18 @@
 {
   "$schema": "Office 24 opening M1 allocation from Head Office (Fineract journal)",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "officeId": 24,
   "externalId": "HOSPITALLERS-ZARDASHT-IRAQ-IRAN",
   "referenceNumber": "HOSPITALLERS-24-OPENING-M1",
+  "headOfficeReferenceNumber": "HOSPITALLERS-24-OPENING-M1-HO",
   "comments": "M1 allocation from Head Office — Dr 1410 Due From HO / Cr 2100 M1 Central Liabilities",
   "debitGlCode": "1410",
   "creditGlCode": "2100",
+  "headOfficeDebitGlCode": "2100",
+  "headOfficeCreditGlCode": "2410",
+  "materialOpeningUsd": 1000000000,
+  "journalMatrixDoc": "docs/04-configuration/mifos-omnl-central-bank/omnl-journal-matrix-hospitallers24-opening-1b.json",
+  "runbookDoc": "docs/04-configuration/mifos-omnl-central-bank/HOSPITALLERS24_OFFICE_OPENING_1B_M1.md",
   "currency": "USD",
   "ipsasRef": "IPSAS 28",
   "amountEnv": "OFFICE24_OPENING_M1_USD",
diff --git a/config/omnl-hospitallers-office24-status.v1.json b/config/omnl-hospitallers-office24-status.v1.json
new file mode 100644
index 0000000..7be81e2
--- /dev/null
+++ b/config/omnl-hospitallers-office24-status.v1.json
@@ -0,0 +1,18 @@
+{
+  "version": "1.0.0",
+  "officeId": 24,
+  "externalId": "HOSPITALLERS-ZARDASHT-IRAQ-IRAN",
+  "fundingPosted": true,
+  "openingM1Usd": 1000000000,
+  "postedAt": "2026-06-29T10:44:05Z",
+  "references": {
+    "officeLeg": "HOSPITALLERS-24-OPENING-M1",
+    "headOfficeLeg": "HOSPITALLERS-24-OPENING-M1-HO"
+  },
+  "evidence": {
+    "canaryBundle": "reconciliation/canary-office24-hospitallers-1b-20260629-104405/",
+    "complianceBundle": "reports/compliance/hospitallers-office24-1b-open-20260629/",
+    "statusReport": "reports/status/hospitallers-office24-1b-open-20260629.json"
+  },
+  "notes": "Do not run seed-office-24-opening-journal.mjs at $1B — office leg already posted in Fineract."
+}
diff --git a/scripts/deployment/activate-omnl-production.sh b/scripts/deployment/activate-omnl-production.sh
index 05c14a1..2005350 100644
--- a/scripts/deployment/activate-omnl-production.sh
+++ b/scripts/deployment/activate-omnl-production.sh
@@ -34,17 +34,25 @@ else
 fi
 
 log "=== 5/5 Office 24 opening journal (activate live ledgers) ==="
+MATERIAL_OPENING_USD="${OMNL_MATERIAL_OPENING_THRESHOLD:-10000000}"
+STATUS_FILE="$REPO_DIR/config/omnl-hospitallers-office24-status.v1.json"
 if [[ "$SEED_JOURNAL" == "1" ]] && [[ -f "$ENV_FILE" ]]; then
   set -a
   # shellcheck disable=SC1090
   source "$ENV_FILE"
   set +a
-  if [[ -n "${OFFICE24_OPENING_M1_USD:-}" ]]; then
-    node scripts/deployment/seed-office-24-opening-journal.mjs
-    bash scripts/deployment/deploy-omnl-bank-production.sh
+  if [[ -f "$STATUS_FILE" ]] && grep -q '"fundingPosted"[[:space:]]*:[[:space:]]*true' "$STATUS_FILE" 2>/dev/null; then
+    log "Office 24 fundingPosted=true in status SSOT — skip single-leg seed (journal already live)"
+  elif [[ -n "${OFFICE24_OPENING_M1_USD:-}" ]]; then
+    opening_amt="${OFFICE24_OPENING_M1_USD//,/}"
+    if awk -v amt="$opening_amt" -v lim="$MATERIAL_OPENING_USD" 'BEGIN { exit !(amt >= lim) }'; then
+      log "Material opening amount ($OFFICE24_OPENING_M1_USD) — skip single-leg seed (use 1b canary/execute matrix)"
+    else
+      node scripts/deployment/seed-office-24-opening-journal.mjs
+      bash scripts/deployment/deploy-omnl-bank-production.sh
+    fi
   else
-    log "OFFICE24_OPENING_M1_USD not set — ledger stays connected-but-empty (fineractLive=false)"
-    log "Set OFFICE24_OPENING_M1_USD in .env and re-run: bash scripts/deployment/activate-omnl-production.sh"
+    log "OFFICE24_OPENING_M1_USD not set — ledger reads live Fineract only (no seed)"
   fi
 else
   log "Journal seed skipped (SEED_OFFICE24_JOURNAL=$SEED_JOURNAL)"
diff --git a/scripts/deployment/seed-office-24-opening-journal.mjs b/scripts/deployment/seed-office-24-opening-journal.mjs
index ecbe655..c07b051 100644
--- a/scripts/deployment/seed-office-24-opening-journal.mjs
+++ b/scripts/deployment/seed-office-24-opening-journal.mjs
@@ -34,6 +34,15 @@ if (!Number.isFinite(amount) || amount <= 0) {
   process.exit(1);
 }
 
+const MATERIAL_THRESHOLD = 10_000_000;
+if (amount >= MATERIAL_THRESHOLD) {
+  console.error(
+    `Amount ${amount} exceeds single-leg seed limit ($${MATERIAL_THRESHOLD}). ` +
+      'Material openings use the two-leg HO matrix: scripts/omnl/office24-hospitallers-1b-canary.sh and office24-hospitallers-1b-execute.sh',
+  );
+  process.exit(1);
+}
+
 const auth = Buffer.from(`${user}:${pass}`).toString('base64');
 const headers = {
   Authorization: `Basic ${auth}`,