diff --git a/src/plugins/data/README.md b/src/plugins/data/README.md
index 53618ec049e7c..0fa304c988935 100644
--- a/src/plugins/data/README.md
+++ b/src/plugins/data/README.md
@@ -6,4 +6,4 @@
 - `filter`
 - `index_patterns`
 - `query`
-- `search`
+- `search`
\ No newline at end of file
diff --git a/src/plugins/es_ui_shared/public/index.ts b/src/plugins/es_ui_shared/public/index.ts
index 2925e5e16458e..8ed01b9b61c7e 100644
--- a/src/plugins/es_ui_shared/public/index.ts
+++ b/src/plugins/es_ui_shared/public/index.ts
@@ -27,3 +27,5 @@ export {
   sendRequest,
   useRequest,
 } from './request/np_ready_request';
+
+export { indices } from './indices';
diff --git a/src/legacy/ui/public/indices/constants/index.js b/src/plugins/es_ui_shared/public/indices/constants/index.ts
similarity index 94%
rename from src/legacy/ui/public/indices/constants/index.js
rename to src/plugins/es_ui_shared/public/indices/constants/index.ts
index 72ecc2e4c87de..825975fa161b5 100644
--- a/src/legacy/ui/public/indices/constants/index.js
+++ b/src/plugins/es_ui_shared/public/indices/constants/index.ts
@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import { indexPatterns } from '../../../../../plugins/data/public';
+import { indexPatterns } from '../../../../data/public';
 
 export const INDEX_ILLEGAL_CHARACTERS_VISIBLE = [...indexPatterns.ILLEGAL_CHARACTERS_VISIBLE, '*'];
 
diff --git a/src/legacy/ui/public/indices/index.js b/src/plugins/es_ui_shared/public/indices/index.ts
similarity index 79%
rename from src/legacy/ui/public/indices/index.js
rename to src/plugins/es_ui_shared/public/indices/index.ts
index c1646bd66e367..a6d279a5c2b4f 100644
--- a/src/legacy/ui/public/indices/index.js
+++ b/src/plugins/es_ui_shared/public/indices/index.ts
@@ -17,10 +17,17 @@
  * under the License.
  */
 
-export { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from './constants';
+import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from './constants';
 
-export {
+import {
   indexNameBeginsWithPeriod,
   findIllegalCharactersInIndexName,
   indexNameContainsSpaces,
 } from './validate';
+
+export const indices = {
+  INDEX_ILLEGAL_CHARACTERS_VISIBLE,
+  indexNameBeginsWithPeriod,
+  findIllegalCharactersInIndexName,
+  indexNameContainsSpaces,
+};
diff --git a/src/legacy/ui/public/indices/validate/index.js b/src/plugins/es_ui_shared/public/indices/validate/index.ts
similarity index 100%
rename from src/legacy/ui/public/indices/validate/index.js
rename to src/plugins/es_ui_shared/public/indices/validate/index.ts
diff --git a/src/legacy/ui/public/indices/validate/validate_index.test.js b/src/plugins/es_ui_shared/public/indices/validate/validate_index.test.ts
similarity index 100%
rename from src/legacy/ui/public/indices/validate/validate_index.test.js
rename to src/plugins/es_ui_shared/public/indices/validate/validate_index.test.ts
diff --git a/src/legacy/ui/public/indices/validate/validate_index.js b/src/plugins/es_ui_shared/public/indices/validate/validate_index.ts
similarity index 67%
rename from src/legacy/ui/public/indices/validate/validate_index.js
rename to src/plugins/es_ui_shared/public/indices/validate/validate_index.ts
index 5deaa83a807d9..00ac1342400ac 100644
--- a/src/legacy/ui/public/indices/validate/validate_index.js
+++ b/src/plugins/es_ui_shared/public/indices/validate/validate_index.ts
@@ -19,23 +19,29 @@
 
 import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from '../constants';
 
-// Names beginning with periods are reserved for system indices.
-export function indexNameBeginsWithPeriod(indexName = '') {
+// Names beginning with periods are reserved for hidden indices.
+export function indexNameBeginsWithPeriod(indexName?: string): boolean {
+  if (indexName === undefined) {
+    return false;
+  }
   return indexName[0] === '.';
 }
 
-export function findIllegalCharactersInIndexName(indexName) {
-  const illegalCharacters = INDEX_ILLEGAL_CHARACTERS_VISIBLE.reduce((chars, char) => {
-    if (indexName.includes(char)) {
-      chars.push(char);
-    }
+export function findIllegalCharactersInIndexName(indexName: string): string[] {
+  const illegalCharacters = INDEX_ILLEGAL_CHARACTERS_VISIBLE.reduce(
+    (chars: string[], char: string): string[] => {
+      if (indexName.includes(char)) {
+        chars.push(char);
+      }
 
-    return chars;
-  }, []);
+      return chars;
+    },
+    []
+  );
 
   return illegalCharacters;
 }
 
-export function indexNameContainsSpaces(indexName) {
+export function indexNameContainsSpaces(indexName: string): boolean {
   return indexName.includes(' ');
 }
diff --git a/src/plugins/es_ui_shared/static/forms/helpers/field_validators/index_name.ts b/src/plugins/es_ui_shared/static/forms/helpers/field_validators/index_name.ts
index 524cac27341ab..5e969fa715172 100644
--- a/src/plugins/es_ui_shared/static/forms/helpers/field_validators/index_name.ts
+++ b/src/plugins/es_ui_shared/static/forms/helpers/field_validators/index_name.ts
@@ -17,14 +17,11 @@
  * under the License.
  */
 
-// Note: we can't import from "ui/indices" as the TS Type definition don't exist
-// import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from 'ui/indices';
+import { indices } from '../../../../public';
 import { ValidationFunc } from '../../hook_form_lib';
 import { startsWith, containsChars } from '../../../validators/string';
 import { ERROR_CODE } from './types';
 
-const INDEX_ILLEGAL_CHARACTERS = ['\\', '/', '?', '"', '<', '>', '|', '*'];
-
 export const indexNameField = (i18n: any) => (
   ...args: Parameters<ValidationFunc>
 ): ReturnType<ValidationFunc<any, ERROR_CODE>> => {
@@ -51,7 +48,9 @@ export const indexNameField = (i18n: any) => (
     };
   }
 
-  const { charsFound, doesContain } = containsChars(INDEX_ILLEGAL_CHARACTERS)(value as string);
+  const { charsFound, doesContain } = containsChars(indices.INDEX_ILLEGAL_CHARACTERS_VISIBLE)(
+    value as string
+  );
   if (doesContain) {
     return {
       message: i18n.translate('esUi.forms.fieldValidation.indexNameInvalidCharactersError', {
diff --git a/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/auto_follow_pattern_form.js b/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/auto_follow_pattern_form.js
index ebb731a1b1aca..d4e418a964c8f 100644
--- a/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/auto_follow_pattern_form.js
+++ b/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/auto_follow_pattern_form.js
@@ -29,7 +29,8 @@ import {
   EuiTitle,
 } from '@elastic/eui';
 
-import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from 'ui/indices';
+import { indices } from '../../../../../../../src/plugins/es_ui_shared/public';
+import { indexPatterns } from '../../../../../../../src/plugins/data/public';
 
 import routing from '../services/routing';
 import { extractQueryParams } from '../services/query_params';
@@ -44,10 +45,9 @@ import {
 } from '../services/auto_follow_pattern_validators';
 
 import { AutoFollowPatternRequestFlyout } from './auto_follow_pattern_request_flyout';
-import { indexPatterns } from '../../../../../../../src/plugins/data/public';
 
 const indexPatternIllegalCharacters = indexPatterns.ILLEGAL_CHARACTERS_VISIBLE.join(' ');
-const indexNameIllegalCharacters = INDEX_ILLEGAL_CHARACTERS_VISIBLE.join(' ');
+const indexNameIllegalCharacters = indices.INDEX_ILLEGAL_CHARACTERS_VISIBLE.join(' ');
 
 const getEmptyAutoFollowPattern = (remoteClusterName = '') => ({
   name: '',
diff --git a/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.js b/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.js
index 329ef4756133d..fc8f9398807e7 100644
--- a/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.js
+++ b/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.js
@@ -9,7 +9,6 @@ import PropTypes from 'prop-types';
 import { debounce } from 'lodash';
 import { i18n } from '@kbn/i18n';
 import { FormattedMessage } from '@kbn/i18n/react';
-import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from 'ui/indices';
 import { fatalError } from 'ui/notify';
 
 import {
@@ -30,6 +29,7 @@ import {
   EuiTitle,
 } from '@elastic/eui';
 
+import { indices } from '../../../../../../../../src/plugins/es_ui_shared/public';
 import { indexNameValidator, leaderIndexValidator } from '../../services/input_validation';
 import routing from '../../services/routing';
 import { loadIndices } from '../../services/api';
@@ -47,7 +47,7 @@ import { RemoteClustersFormField } from '../remote_clusters_form_field';
 
 import { FollowerIndexRequestFlyout } from './follower_index_request_flyout';
 
-const indexNameIllegalCharacters = INDEX_ILLEGAL_CHARACTERS_VISIBLE.join(' ');
+const indexNameIllegalCharacters = indices.INDEX_ILLEGAL_CHARACTERS_VISIBLE.join(' ');
 
 const fieldToValidatorMap = advancedSettingsFields.reduce(
   (map, advancedSetting) => {
diff --git a/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.test.js b/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.test.js
index aac0427098813..93da20a8ed93c 100644
--- a/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.test.js
+++ b/x-pack/legacy/plugins/cross_cluster_replication/public/app/components/follower_index_form/follower_index_form.test.js
@@ -7,9 +7,6 @@
 import { updateFields, updateFormErrors } from './follower_index_form';
 
 jest.mock('ui/new_platform');
-jest.mock('ui/indices', () => ({
-  INDEX_ILLEGAL_CHARACTERS_VISIBLE: [],
-}));
 
 describe('<FollowerIndexForm /> state transitions', () => {
   it('updateFormErrors() should merge errors with existing fieldsErrors', () => {
diff --git a/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/auto_follow_pattern_validators.js b/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/auto_follow_pattern_validators.js
index 18610c87c0a51..5186a02383d33 100644
--- a/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/auto_follow_pattern_validators.js
+++ b/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/auto_follow_pattern_validators.js
@@ -8,13 +8,14 @@ import React from 'react';
 import { i18n } from '@kbn/i18n';
 import { FormattedMessage } from '@kbn/i18n/react';
 
-import {
+import { indices } from '../../../../../../../src/plugins/es_ui_shared/public';
+import { indexPatterns } from '../../../../../../../src/plugins/data/public';
+
+const {
   indexNameBeginsWithPeriod,
   findIllegalCharactersInIndexName,
   indexNameContainsSpaces,
-} from 'ui/indices';
-
-import { indexPatterns } from '../../../../../../../src/plugins/data/public';
+} = indices;
 
 export const validateName = (name = '') => {
   let errorMsg = null;
diff --git a/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/input_validation.js b/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/input_validation.js
index 22f7d3be2795f..981b3f5929751 100644
--- a/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/input_validation.js
+++ b/x-pack/legacy/plugins/cross_cluster_replication/public/app/services/input_validation.js
@@ -6,7 +6,7 @@
 
 import React from 'react';
 import { FormattedMessage } from '@kbn/i18n/react';
-import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from 'ui/indices';
+import { indices } from '../../../../../../../src/plugins/es_ui_shared/public';
 
 const isEmpty = value => {
   return !value || !value.trim().length;
@@ -19,7 +19,7 @@ const beginsWithPeriod = value => {
 };
 
 const findIllegalCharacters = value => {
-  return INDEX_ILLEGAL_CHARACTERS_VISIBLE.reduce((chars, char) => {
+  return indices.INDEX_ILLEGAL_CHARACTERS_VISIBLE.reduce((chars, char) => {
     if (value.includes(char)) {
       chars.push(char);
     }
diff --git a/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps/step_logistics.js b/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps/step_logistics.js
index 024001d463240..c3996fe3231b1 100644
--- a/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps/step_logistics.js
+++ b/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps/step_logistics.js
@@ -26,14 +26,14 @@ import {
 
 // eslint-disable-next-line @kbn/eslint/no-restricted-paths
 import { CronEditor } from '../../../../../../../../../src/plugins/es_ui_shared/public/components/cron_editor';
-import { INDEX_ILLEGAL_CHARACTERS_VISIBLE } from '../../../../legacy_imports';
+import { indexPatterns } from '../../../../../../../../../src/plugins/data/public';
+
+import { indices } from '../../../../shared_imports';
 import { getLogisticalDetailsUrl, getCronUrl } from '../../../services';
 import { StepError } from './components';
 
-import { indexPatterns } from '../../../../../../../../../src/plugins/data/public';
-
 const indexPatternIllegalCharacters = indexPatterns.ILLEGAL_CHARACTERS_VISIBLE.join(' ');
-const indexIllegalCharacters = INDEX_ILLEGAL_CHARACTERS_VISIBLE.join(' ');
+const indexIllegalCharacters = indices.INDEX_ILLEGAL_CHARACTERS_VISIBLE.join(' ');
 
 export class StepLogistics extends Component {
   static propTypes = {
diff --git a/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps_config/validate_rollup_index.js b/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps_config/validate_rollup_index.js
index 637caa2199c42..ac4bacc291ea3 100644
--- a/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps_config/validate_rollup_index.js
+++ b/x-pack/legacy/plugins/rollup/public/crud_app/sections/job_create/steps_config/validate_rollup_index.js
@@ -6,7 +6,7 @@
 
 import React from 'react';
 import { FormattedMessage } from '@kbn/i18n/react';
-import { findIllegalCharactersInIndexName } from '../../../../legacy_imports';
+import { indices } from '../../../../shared_imports';
 
 export function validateRollupIndex(rollupIndex, indexPattern) {
   if (!rollupIndex || !rollupIndex.trim()) {
@@ -27,7 +27,7 @@ export function validateRollupIndex(rollupIndex, indexPattern) {
     ];
   }
 
-  const illegalCharacters = findIllegalCharactersInIndexName(rollupIndex);
+  const illegalCharacters = indices.findIllegalCharactersInIndexName(rollupIndex);
 
   if (illegalCharacters.length) {
     return [
diff --git a/x-pack/legacy/plugins/rollup/public/legacy_imports.ts b/x-pack/legacy/plugins/rollup/public/legacy_imports.ts
index 07155a4b0a60e..85fa3022f59ed 100644
--- a/x-pack/legacy/plugins/rollup/public/legacy_imports.ts
+++ b/x-pack/legacy/plugins/rollup/public/legacy_imports.ts
@@ -4,8 +4,5 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-// @ts-ignore
-export { findIllegalCharactersInIndexName, INDEX_ILLEGAL_CHARACTERS_VISIBLE } from 'ui/indices';
-
 export { AggTypeFilters } from 'ui/agg_types';
 export { AggTypeFieldFilters } from 'ui/agg_types';
diff --git a/x-pack/legacy/plugins/rollup/public/shared_imports.ts b/x-pack/legacy/plugins/rollup/public/shared_imports.ts
new file mode 100644
index 0000000000000..6bf74da6db6fe
--- /dev/null
+++ b/x-pack/legacy/plugins/rollup/public/shared_imports.ts
@@ -0,0 +1,7 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+export { indices } from '../../../../../src/plugins/es_ui_shared/public';