diff --git a/lib/AdobeState.js b/lib/AdobeState.js
index 6baefdd..01d36ce 100644
--- a/lib/AdobeState.js
+++ b/lib/AdobeState.js
@@ -29,7 +29,8 @@ const {
   REQUEST_ID_HEADER,
   MIN_LIST_COUNT_HINT,
   REGEX_PATTERN_MATCH_KEY,
-  MAX_TTL_SECONDS
+  MAX_TTL_SECONDS,
+  ALLOWED_STAGE_REGION
 } = require('./constants')
 
 /* *********************************** typedefs *********************************** */
@@ -146,9 +147,10 @@ class AdobeState {
    * @private
    * @param {string} namespace the namespace for the Adobe State Store
    * @param {string} apikey the apikey for the Adobe State Store
+   * @param {string} env the Adobe environment (AIO_CLI_ENV)
    * @param {('amer'|'apac'|'emea')} [region] the region for the Adobe State Store. defaults to 'amer'
    */
-  constructor (namespace, apikey, region) {
+  constructor (namespace, apikey, env, region) {
     /** @private */
     this.namespace = namespace
     /** @private */
@@ -158,7 +160,7 @@ class AdobeState {
     /** @private */
     this.region = region
     /** @private */
-    this.endpoint = this.getRegionalEndpoint(ENDPOINTS[getCliEnv()], region)
+    this.endpoint = this.getRegionalEndpoint(ENDPOINTS[env], region)
     /** @private */
     this.fetchRetry = new HttpExponentialBackoff()
   }
@@ -228,6 +230,16 @@ class AdobeState {
     const cloned = utils.withHiddenFields(credentials, ['apikey'])
     logger.debug(`init AdobeState with ${JSON.stringify(cloned, null, 2)}`)
 
+    const env = getCliEnv()
+
+    if (env === 'stage' &&
+      credentials.region && credentials.region !== ALLOWED_STAGE_REGION) {
+      logAndThrow(new codes.ERROR_BAD_ARGUMENT({
+        messageValues: `AIO_CLI_ENV=stage only supports the ${ALLOWED_STAGE_REGION} region.`,
+        sdkDetails: cloned
+      }))
+    }
+
     if (!credentials.region) {
       credentials.region = ALLOWED_REGIONS.at(0) // first item is the default
     }
@@ -253,7 +265,7 @@ class AdobeState {
       }))
     }
 
-    return new AdobeState(credentials.namespace, credentials.apikey, credentials.region)
+    return new AdobeState(credentials.namespace, credentials.apikey, env, credentials.region)
   }
 
   /* **************************** ADOBE STATE STORE OPERATORS ***************************** */
diff --git a/lib/constants.js b/lib/constants.js
index 4167c55..46b049a 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -22,11 +22,13 @@ const ENDPOINT_PROD_INTERNAL = 'https://storage-state-<region>.app-builder.int.a
 const ENDPOINT_STAGE = 'https://storage-state-<region>.stg.app-builder.adp.adobe.io'
 const ENDPOINT_STAGE_INTERNAL = 'https://storage-state-<region>.stg.app-builder.adp.adobe.io'
 
+// prod
 const ALLOWED_REGIONS = [ // first region is the default region
   'amer',
-  'emea'
-  // soon to come: 'apac'
+  'emea',
+  'apac'
 ]
+const ALLOWED_STAGE_REGION = 'amer' // STAGE only supports one region
 
 // can be overwritten by env
 const {
@@ -55,6 +57,7 @@ const REQUEST_ID_HEADER = 'x-request-id'
 
 module.exports = {
   ALLOWED_REGIONS,
+  ALLOWED_STAGE_REGION,
   ENDPOINTS,
   CUSTOM_ENDPOINT,
   MAX_KEY_SIZE,
diff --git a/test/AdobeState.test.js b/test/AdobeState.test.js
index 5b2ee8d..9f73356 100644
--- a/test/AdobeState.test.js
+++ b/test/AdobeState.test.js
@@ -721,17 +721,61 @@ describe('private methods', () => {
     expect(url).toEqual(`https://storage-state-amer.app-builder.adp.adobe.io/containers/${fakeCredentials.namespace}`)
   })
 
-  test('custom stage, emea', async () => {
+  test('env=stage', async () => {
+    jest.resetModules()
+    const env = STAGE_ENV
+    mockCLIEnv.mockReturnValue(env)
+
+    // need to instantiate a new store, when env changes
+    const customAdobeState = require('../lib/AdobeState').AdobeState
+    const store = await customAdobeState.init({ ...fakeCredentials })
+    const url = store.createRequestUrl()
+    expect(url).toEqual(`https://storage-state-amer.stg.app-builder.adp.adobe.io/containers/${fakeCredentials.namespace}`)
+  })
+
+  test('env=stage && region!=amer', async () => {
     jest.resetModules()
-    const region = 'emea'
     const env = STAGE_ENV
     mockCLIEnv.mockReturnValue(env)
 
+    // need to instantiate a new store, when env changes
+    const customAdobeState = require('../lib/AdobeState').AdobeState
+    await expect(customAdobeState.init({ ...fakeCredentials, region: 'emea' })).rejects.toThrow('[AdobeStateLib:ERROR_BAD_ARGUMENT] AIO_CLI_ENV=stage only supports the amer region.')
+    await expect(customAdobeState.init({ ...fakeCredentials, region: 'apac' })).rejects.toThrow('[AdobeStateLib:ERROR_BAD_ARGUMENT] AIO_CLI_ENV=stage only supports the amer region.')
+    await expect(customAdobeState.init({ ...fakeCredentials, region: 'amerr' })).rejects.toThrow('[AdobeStateLib:ERROR_BAD_ARGUMENT] AIO_CLI_ENV=stage only supports the amer region.')
+  })
+
+  test('region=amer', async () => {
+    jest.resetModules()
+    const region = 'amer'
+
+    // need to instantiate a new store, when env changes
+    const customAdobeState = require('../lib/AdobeState').AdobeState
+    const store = await customAdobeState.init({ ...fakeCredentials, region })
+    const url = store.createRequestUrl()
+    expect(url).toEqual(`https://storage-state-${region}.app-builder.adp.adobe.io/containers/${fakeCredentials.namespace}`)
+  })
+
+  test('region=emea', async () => {
+    jest.resetModules()
+    const region = 'emea'
+
+    // need to instantiate a new store, when env changes
+    const customAdobeState = require('../lib/AdobeState').AdobeState
+    const store = await customAdobeState.init({ ...fakeCredentials, region })
+    const url = store.createRequestUrl()
+    expect(url).toEqual(`https://storage-state-${region}.app-builder.adp.adobe.io/containers/${fakeCredentials.namespace}`)
+  })
+
+  test('region=apac', async () => {
+    jest.resetModules()
+    const region = 'apac'
+
     // need to instantiate a new store, when env changes
     const customAdobeState = require('../lib/AdobeState').AdobeState
     const store = await customAdobeState.init({ ...fakeCredentials, region })
     const url = store.createRequestUrl()
-    expect(url).toEqual(`https://storage-state-${region}.stg.app-builder.adp.adobe.io/containers/${fakeCredentials.namespace}`)
+    expect(url).toEqual(`https://storage-state-${region}.app-builder.adp.adobe.io/containers/${fakeCredentials.namespace}`)
   })
 
   test('custom AIO_STATE_ENDPOINT', async () => {