diff --git a/packages/inter-protocol/src/proposals/add-auction.js b/packages/inter-protocol/src/proposals/add-auction.js
index 6814fbdcc87..d6b351f3ef0 100644
--- a/packages/inter-protocol/src/proposals/add-auction.js
+++ b/packages/inter-protocol/src/proposals/add-auction.js
@@ -11,6 +11,7 @@ const trace = makeTracer('NewAuction', true);
  *   auctionUpgradeNewInstance: Instance;
  *   auctionUpgradeNewGovCreator: any;
  *   newContractGovBundleId: string;
+ *   retiredContractInstances: MapStore<string, Instance>;
  * }>} interlockPowers
  */
 
@@ -35,6 +36,7 @@ export const addAuction = async (
       economicCommitteeCreatorFacet: electorateCreatorFacet,
       governedContractKits: governedContractKitsP,
       priceAuthority8400,
+      retiredContractInstances: retiredContractInstancesP,
       zoe,
     },
     produce: {
@@ -79,6 +81,10 @@ export const addAuction = async (
     auctioneerInstallationP,
   ]);
 
+  // save the auctioneer instance so we can manage it later
+  const retiredContractInstances = await retiredContractInstancesP;
+  retiredContractInstances.init('auction-vat157', legacyKit.instance);
+
   // Each field has an extra layer of type +  value:
   // AuctionStartDelay: { type: 'relativeTime', value: { relValue: 2n, timerBrand: Object [Alleged: timerBrand] {} } }
   /** @type {any} */
@@ -210,6 +216,7 @@ export const ADD_AUCTION_MANIFEST = harden({
       economicCommitteeCreatorFacet: true,
       governedContractKits: true,
       priceAuthority8400: true,
+      retiredContractInstances: true,
       zoe: true,
     },
     produce: {
diff --git a/packages/inter-protocol/src/proposals/deploy-price-feeds.js b/packages/inter-protocol/src/proposals/deploy-price-feeds.js
index f98f62223f2..ea1b7c2df19 100644
--- a/packages/inter-protocol/src/proposals/deploy-price-feeds.js
+++ b/packages/inter-protocol/src/proposals/deploy-price-feeds.js
@@ -84,7 +84,8 @@ export const ensureOracleBrand = async (
 };
 
 /**
- * @param {EconomyBootstrapPowers} powers
+ * @param {EconomyBootstrapPowers &
+ *   PromiseSpaceOf<{ retiredContractInstances: MapStore<string, Instance> }>} powers
  * @param {{
  *   AGORIC_INSTANCE_NAME: string;
  *   contractTerms: import('@agoric/inter-protocol/src/price/fluxAggregatorKit.js').ChainlinkConfig;
@@ -103,8 +104,9 @@ const startPriceAggregatorInstance = async (
       highPrioritySendersManager,
       namesByAddressAdmin,
       startGovernedUpgradable,
+      retiredContractInstances: retiredContractInstancesP,
     },
-    instance: { produce: produceInstance },
+    instance: { produce: produceInstance, consume: consumeInstance },
   },
   { AGORIC_INSTANCE_NAME, contractTerms, brandIn, brandOut },
   installation,
@@ -139,6 +141,15 @@ const startPriceAggregatorInstance = async (
     // @ts-expect-error GovernableStartFn vs. fluxAggregatorContract.js start
     installation,
   });
+  const retiringInstance = consumeInstance[AGORIC_INSTANCE_NAME];
+  const retiredContractInstances = await retiredContractInstancesP;
+  retiredContractInstances.init(
+    // XXX tail of label needs to vary with upgrade. BundleId would be different
+    // from previous, but is not necessarily unique.
+    `priceFeed-${AGORIC_INSTANCE_NAME}-u18`,
+    retiringInstance,
+  );
+
   produceInstance[AGORIC_INSTANCE_NAME].reset();
   produceInstance[AGORIC_INSTANCE_NAME].resolve(governedKit.instance);
   trace(
@@ -191,7 +202,9 @@ const distributeInvitations = async (
 };
 
 /**
- * @param {EconomyBootstrapPowers & NamedVatPowers} powers
+ * @param {EconomyBootstrapPowers &
+ *   NamedVatPowers &
+ *   PromiseSpaceOf<{ retiredContractInstances: MapStore<string, Instance> }>} powers
  * @param {{
  *   options: PriceFeedConfig & {
  *     priceAggregatorRef: { bundleID: string };
@@ -307,6 +320,7 @@ export const getManifestForPriceFeeds = async (
       installation: { produce: { priceAggregator: t } },
       instance: {
         produce: t,
+        consume: t,
       },
       oracleBrand: { produce: t },
       produce: { priceAuthority8400: t },
diff --git a/packages/inter-protocol/src/proposals/replaceElectorate.js b/packages/inter-protocol/src/proposals/replaceElectorate.js
index cb862be5a67..2228a9b6501 100644
--- a/packages/inter-protocol/src/proposals/replaceElectorate.js
+++ b/packages/inter-protocol/src/proposals/replaceElectorate.js
@@ -15,6 +15,7 @@ import {
   assertPathSegment,
   makeStorageNodeChild,
 } from '@agoric/internal/src/lib-chainStorage.js';
+import { makeScalarBigMapStore } from '@agoric/vat-data';
 import { reserveThenDeposit } from './utils.js';
 
 /** @import {EconomyBootstrapPowers} from './econ-behaviors.js' */
@@ -181,8 +182,10 @@ const inviteToEconCharter = async (
  * Starts a new Economic Committee (EC) by creating an instance with the
  * provided committee specifications.
  *
- * @param {EconomyBootstrapPowers} powers - The resources and capabilities
- *   required to start the committee.
+ * @param {EconomyBootstrapPowers &
+ *   PromiseSpaceOf<{ retiredContractInstances: MapStore<string, Instance> }>} powers
+ *   - The resources and capabilities required to start the committee.
+ *
  * @param {{
  *   options: {
  *     committeeName: string;
@@ -197,11 +200,16 @@ const inviteToEconCharter = async (
 const startNewEconomicCommittee = async (
   {
     consume: { board, chainStorage, startUpgradable },
-    produce: { economicCommitteeKit, economicCommitteeCreatorFacet },
+    produce: {
+      economicCommitteeKit,
+      economicCommitteeCreatorFacet,
+      retiredContractInstances,
+    },
     installation: {
       consume: { committee },
     },
     instance: {
+      consume: { economicCommittee: economicCommitteeOriginalP },
       produce: { economicCommittee },
     },
   },
@@ -214,6 +222,15 @@ const startNewEconomicCommittee = async (
   trace(`committeeName ${committeeName}`);
   trace(`committeeSize ${committeeSize}`);
 
+  // Record the retired electorate vat so we can manage it later.
+  const contractInstanceMap = makeScalarBigMapStore(
+    'retiredContractInstances',
+    { durable: true },
+  );
+  const econeconomicCommitteeOriginal = await economicCommitteeOriginalP;
+  contractInstanceMap.init('electorate-v24', econeconomicCommitteeOriginal);
+  retiredContractInstances.resolve(contractInstanceMap);
+
   const committeesNode = await makeStorageNodeChild(
     chainStorage,
     COMMITTEES_ROOT,
@@ -309,6 +326,7 @@ const startNewEconCharter = async ({
  * @typedef {PromiseSpaceOf<{
  *   auctionUpgradeNewInstance: Instance;
  *   auctionUpgradeNewGovCreator: any;
+ *   retiredContractInstances: MapStore<string, Instance>;
  * }>} interlockPowers
  */
 
@@ -492,6 +510,7 @@ export const getManifestForReplaceAllElectorates = async (
         chainStorage: true,
         highPrioritySendersManager: true,
         namesByAddressAdmin: true,
+        retiredContractInstances: true,
         // Rest of these are designed to be widely shared
         board: true,
         startUpgradable: true,
@@ -514,6 +533,7 @@ export const getManifestForReplaceAllElectorates = async (
           economicCommittee: true,
           econCommitteeCharter: true,
         },
+        consume: { economicCommittee: true },
       },
     },
   },