diff --git a/a3p-integration/proposals/p:upgrade-19/package.json b/a3p-integration/proposals/p:upgrade-19/package.json
index 2afd33dfb4b..c49beccaf1f 100644
--- a/a3p-integration/proposals/p:upgrade-19/package.json
+++ b/a3p-integration/proposals/p:upgrade-19/package.json
@@ -2,7 +2,8 @@
   "agoricProposal": {
     "type": "/agoric.swingset.CoreEvalProposal",
     "sdk-generate": [
-      "testing/replace-feeDistributor-short.js replaceFeeDistributor"
+      "testing/replace-feeDistributor-short.js replaceFeeDistributor",
+      "testing/test-upgraded-board.js"
     ]
   },
   "type": "module",
diff --git a/a3p-integration/proposals/p:upgrade-19/test.sh b/a3p-integration/proposals/p:upgrade-19/test.sh
index 7b9ea0090c5..056fe6836ac 100644
--- a/a3p-integration/proposals/p:upgrade-19/test.sh
+++ b/a3p-integration/proposals/p:upgrade-19/test.sh
@@ -1,3 +1,4 @@
 #!/bin/bash
 
 yarn ava replaceFeeDistributor.test.js
+yarn ava upgradedBoard.test.js
diff --git a/a3p-integration/proposals/p:upgrade-19/upgradedBoard.test.js b/a3p-integration/proposals/p:upgrade-19/upgradedBoard.test.js
new file mode 100644
index 00000000000..410025f9388
--- /dev/null
+++ b/a3p-integration/proposals/p:upgrade-19/upgradedBoard.test.js
@@ -0,0 +1,14 @@
+/* eslint-env node */
+// @ts-check
+
+/** @file test that the upgraded board can store and retrieve values. */
+
+import '@endo/init/legacy.js';
+import test from 'ava';
+import { evalBundles } from '@agoric/synthetic-chain';
+
+test('test upgraded board', async t => {
+  await evalBundles('submission');
+
+  t.pass();
+});
diff --git a/golang/cosmos/app/upgrade.go b/golang/cosmos/app/upgrade.go
index 818c1fd63ce..5777c4d6c6d 100644
--- a/golang/cosmos/app/upgrade.go
+++ b/golang/cosmos/app/upgrade.go
@@ -219,6 +219,9 @@ func unreleasedUpgradeHandler(app *GaiaApp, targetUpgrade string) func(sdk.Conte
 				vm.CoreProposalStepForModules(
 					"@agoric/builders/scripts/inter-protocol/replace-feeDistributor.js",
 				),
+				vm.CoreProposalStepForModules(
+					"@agoric/builders/scripts/vats/upgrade-board.js",
+				),
 			)
 		}
 
diff --git a/packages/builders/scripts/testing/test-upgraded-board.js b/packages/builders/scripts/testing/test-upgraded-board.js
new file mode 100644
index 00000000000..28d90d2346d
--- /dev/null
+++ b/packages/builders/scripts/testing/test-upgraded-board.js
@@ -0,0 +1,15 @@
+import { makeHelpers } from '@agoric/deploy-script-support';
+import { getManifestForTestUpgradedBoard } from '@agoric/vats/src/proposals/testUpgradedBoard.js';
+
+/** @type {import('@agoric/deploy-script-support/src/externalTypes.js').CoreEvalBuilder} */
+export const defaultProposalBuilder = async () =>
+  harden({
+    sourceSpec: '@agoric/vats/src/proposals/testUpgradedBoard.js',
+    getManifestCall: [getManifestForTestUpgradedBoard.name],
+  });
+
+/** @type {import('@agoric/deploy-script-support/src/externalTypes.js').DeployScriptFunction} */
+export default async (homeP, endowments) => {
+  const { writeCoreEval } = await makeHelpers(homeP, endowments);
+  await writeCoreEval('testUpgradedBoard', defaultProposalBuilder);
+};
diff --git a/packages/builders/scripts/vats/upgrade-board.js b/packages/builders/scripts/vats/upgrade-board.js
new file mode 100644
index 00000000000..b2b3070b2cd
--- /dev/null
+++ b/packages/builders/scripts/vats/upgrade-board.js
@@ -0,0 +1,20 @@
+import { makeHelpers } from '@agoric/deploy-script-support';
+import { getManifestForUpgradingBoard } from '@agoric/vats/src/proposals/upgrade-board-proposal.js';
+
+/** @type {import('@agoric/deploy-script-support/src/externalTypes.js').CoreEvalBuilder} */
+export const defaultProposalBuilder = async ({ publishRef, install }) =>
+  harden({
+    sourceSpec: '@agoric/vats/src/proposals/upgrade-board-proposal.js',
+    getManifestCall: [
+      getManifestForUpgradingBoard.name,
+      {
+        boardRef: publishRef(install('@agoric/vats/src/vat-board.js')),
+      },
+    ],
+  });
+
+/** @type {import('@agoric/deploy-script-support/src/externalTypes.js').DeployScriptFunction} */
+export default async (homeP, endowments) => {
+  const { writeCoreEval } = await makeHelpers(homeP, endowments);
+  await writeCoreEval('upgrade-board', defaultProposalBuilder);
+};
diff --git a/packages/vats/src/proposals/testUpgradedBoard.js b/packages/vats/src/proposals/testUpgradedBoard.js
new file mode 100644
index 00000000000..7289c6bc60c
--- /dev/null
+++ b/packages/vats/src/proposals/testUpgradedBoard.js
@@ -0,0 +1,35 @@
+import { E, Far } from '@endo/far';
+import { Stable } from '@agoric/internal/src/tokens.js';
+
+export const testUpgradedBoard = async ({
+  consume: { board },
+  brand: {
+    consume: { [Stable.symbol]: stableBrandP },
+  },
+}) => {
+  // /////// can we store something and get it back?  ////////
+  const thing1 = Far('thing1', {});
+  const thing1Id = await E(board).getId(thing1);
+  assert(thing1Id.match(/^board0[0-9]+$/));
+
+  // /////// can we retrieve something stored long ago?  ////////
+  const marshaller = await E(board).getReadonlyMarshaller();
+  assert(marshaller, 'expected a marshaller');
+
+  const stableBrand = await stableBrandP;
+  // /////// can we retrieve a well-known object via its ID?  ////////
+  const stableID = await E(board).getId(stableBrand);
+  const stableBrandRetrieved = await E(board).getValue(stableID);
+  assert(stableBrandRetrieved === stableBrand, 'retrieved matching brand');
+};
+
+export const getManifestForTestUpgradedBoard = () => ({
+  manifest: {
+    [testUpgradedBoard.name]: {
+      consume: { board: true },
+      brand: {
+        consume: { [Stable.symbol]: true },
+      },
+    },
+  },
+});
diff --git a/packages/vats/src/proposals/upgrade-board-proposal.js b/packages/vats/src/proposals/upgrade-board-proposal.js
new file mode 100644
index 00000000000..394da36fcba
--- /dev/null
+++ b/packages/vats/src/proposals/upgrade-board-proposal.js
@@ -0,0 +1,41 @@
+import { E } from '@endo/far';
+
+/**
+ * @param {BootstrapPowers & {
+ *   consume: {
+ *     vatAdminSvc: VatAdminSvc;
+ *     vatStore: MapStore<
+ *       string,
+ *       import('@agoric/swingset-vat').CreateVatResults
+ *     >;
+ *   };
+ * }} powers
+ * @param {object} options
+ * @param {{ boardRef: VatSourceRef }} options.options
+ */
+export const upgradeBoard = async (
+  { consume: { vatAdminSvc, vatStore } },
+  options,
+) => {
+  const { boardRef } = options.options;
+
+  assert(boardRef.bundleID);
+  const boardBundleCap = await E(vatAdminSvc).getBundleCap(boardRef.bundleID);
+  console.log(`Board BUNDLE ID: `, boardRef.bundleID);
+
+  const { adminNode } = await E(vatStore).get('board');
+
+  await E(adminNode).upgrade(boardBundleCap, {});
+};
+
+export const getManifestForUpgradingBoard = (_powers, { boardRef }) => ({
+  manifest: {
+    [upgradeBoard.name]: {
+      consume: {
+        vatAdminSvc: 'vatAdminSvc',
+        vatStore: 'vatStore',
+      },
+    },
+  },
+  options: { boardRef },
+});