diff --git a/packages/angular-material/src/other/label.renderer.ts b/packages/angular-material/src/other/label.renderer.ts
index 9bec468555..a0bb076e72 100644
--- a/packages/angular-material/src/other/label.renderer.ts
+++ b/packages/angular-material/src/other/label.renderer.ts
@@ -35,7 +35,8 @@ import {
   OwnPropsOfRenderer,
   RankedTester,
   rankWith,
-  uiTypeIs
+  uiTypeIs,
+  getOrCreateAjv
 } from '@jsonforms/core';
 import { Subscription } from 'rxjs';
 
@@ -46,7 +47,7 @@ const mapStateToProps = (
   const visible =
     ownProps.visible !== undefined
       ? ownProps.visible
-      : isVisible(ownProps.uischema, getData(state));
+      : isVisible(ownProps.uischema, getData(state), undefined, getOrCreateAjv(state));
 
   return {
     visible
diff --git a/packages/core/src/reducers/core.ts b/packages/core/src/reducers/core.ts
index a9234c379a..03093ec745 100644
--- a/packages/core/src/reducers/core.ts
+++ b/packages/core/src/reducers/core.ts
@@ -283,6 +283,7 @@ export const coreReducer = (
 export const extractData = (state: JsonFormsCore) => get(state, 'data');
 export const extractSchema = (state: JsonFormsCore) => get(state, 'schema');
 export const extractUiSchema = (state: JsonFormsCore) => get(state, 'uischema');
+export const extractOrCreateAjv = (state: JsonFormsCore) => getOrCreateAjv(state);
 
 export const errorsAt = (
   instancePath: string,
diff --git a/packages/core/src/reducers/index.ts b/packages/core/src/reducers/index.ts
index d2053df64c..44fb42ded1 100644
--- a/packages/core/src/reducers/index.ts
+++ b/packages/core/src/reducers/index.ts
@@ -32,6 +32,7 @@ import {
   extractRefParserOptions,
   extractSchema,
   extractUiSchema,
+  extractOrCreateAjv, 
   subErrorsAt,
   ValidationMode
 } from './core';
@@ -63,6 +64,7 @@ import RefParser from 'json-schema-ref-parser';
 import { cellReducer } from './cells';
 import { configReducer } from './config';
 import get from 'lodash/get';
+import { Ajv } from 'ajv';
 
 export {
   rendererReducer,
@@ -98,6 +100,9 @@ export const getUiSchema = (state: JsonFormsState): UISchemaElement =>
   extractUiSchema(get(state, 'jsonforms.core'));
 export const getRefParserOptions = (state: JsonFormsState): RefParser.Options =>
   extractRefParserOptions(get(state, 'jsonforms.core'));
+export const getOrCreateAjv = (
+  state: JsonFormsState
+): Ajv => extractOrCreateAjv(get(state, 'jsonforms.core'));
 export const getDefaultData = (
   state: JsonFormsState
 ): JsonFormsDefaultDataRegistryEntry[] =>
@@ -108,7 +113,6 @@ export const getRenderers = (
 export const getCells = (
   state: JsonFormsState
 ): JsonFormsCellRendererRegistryEntry[] => get(state, 'jsonforms.cells');
-
 /**
  * Finds a registered UI schema to use, if any.
  * @param schema the JSON schema describing the data to be rendered
diff --git a/packages/core/src/util/cell.ts b/packages/core/src/util/cell.ts
index 89e37e0cda..ba8fe6661c 100644
--- a/packages/core/src/util/cell.ts
+++ b/packages/core/src/util/cell.ts
@@ -24,7 +24,7 @@
 */
 import isEmpty from 'lodash/isEmpty';
 import union from 'lodash/union';
-import { getConfig, getData, getErrorAt, getSchema } from '../reducers';
+import { getConfig, getData, getErrorAt, getSchema, getOrCreateAjv } from '../reducers';
 import {
   formatErrorMessage,
   isEnabled,
@@ -107,12 +107,12 @@ export const mapStateToCellProps = (
   const visible =
     ownProps.visible !== undefined
       ? ownProps.visible
-      : isVisible(uischema, rootData);
+      : isVisible(uischema, rootData, undefined, getOrCreateAjv(state));
   const readOnly = state.jsonforms.readOnly;
   const enabled =
     !readOnly && (ownProps.enabled !== undefined
       ? ownProps.enabled
-      : isEnabled(uischema, rootData));
+      : isEnabled(uischema, rootData, undefined, getOrCreateAjv(state)));
   const errors = formatErrorMessage(
     union(getErrorAt(path, schema)(state).map(error => error.message))
   );
diff --git a/packages/core/src/util/index.ts b/packages/core/src/util/index.ts
index 33c98ee30c..e106bf4e8f 100644
--- a/packages/core/src/util/index.ts
+++ b/packages/core/src/util/index.ts
@@ -35,6 +35,8 @@ import {
   toDataPathSegments
 } from './path';
 import { isEnabled, isVisible } from './runtime';
+import { Ajv } from 'ajv';
+import { createAjv } from './validator';
 
 export { createCleanLabel, createLabelDescriptionFrom } from './label';
 
@@ -132,11 +134,11 @@ export { composePaths, composeWithUi, Paths, toDataPath };
 
 // Runtime --
 const Runtime = {
-  isEnabled(uischema: UISchemaElement, data: any): boolean {
-    return isEnabled(uischema, data);
+  isEnabled(uischema: UISchemaElement, data: any, ajv: Ajv = createAjv()): boolean {
+    return isEnabled(uischema, data,undefined, ajv);
   },
-  isVisible(uischema: UISchemaElement, data: any): boolean {
-    return isVisible(uischema, data);
+  isVisible(uischema: UISchemaElement, data: any, ajv: Ajv = createAjv()): boolean {
+    return isVisible(uischema, data, undefined, ajv);
   }
 };
 export { isEnabled, isVisible, Runtime, deriveTypes, hasType };
diff --git a/packages/core/src/util/renderer.ts b/packages/core/src/util/renderer.ts
index b58db691ee..beba4b7cbf 100644
--- a/packages/core/src/util/renderer.ts
+++ b/packages/core/src/util/renderer.ts
@@ -38,7 +38,8 @@ import {
   getSchema,
   getSubErrorsAt,
   getUiSchema,
-  UISchemaTester
+  UISchemaTester,
+  getOrCreateAjv
 } from '../reducers';
 import { RankedTester } from '../testers';
 import { JsonSchema } from '../models/jsonSchema';
@@ -58,7 +59,7 @@ import {
   resolveSubSchemas
 } from '../util';
 import { update, CoreActions } from '../actions';
-import { ErrorObject } from 'ajv';
+import { ErrorObject, Ajv } from 'ajv';
 import { JsonFormsState } from '../store';
 import { AnyAction, Dispatch } from 'redux';
 import { JsonFormsRendererRegistryEntry } from '../reducers/renderers';
@@ -274,6 +275,12 @@ export interface StatePropsOfRenderer {
    */
 
   cells?: JsonFormsCellRendererRegistryEntry[];
+
+  /**
+   * AJV instance from core state.
+   */
+
+   ajv?: Ajv;
 }
 
 /**
@@ -395,12 +402,12 @@ export const mapStateToControlProps = (
   const path = composeWithUi(uischema, ownProps.path);
   const visible: boolean =
     ownProps.visible === undefined || hasShowRule(uischema)
-      ? isVisible(uischema, rootData, ownProps.path)
+      ? isVisible(uischema, rootData, ownProps.path, getOrCreateAjv(state))
       : ownProps.visible;
   const readOnly = state.jsonforms.readOnly;
   const enabled: boolean =
     !readOnly && (ownProps.enabled === undefined || hasEnableRule(uischema)
-      ? isEnabled(uischema, rootData, ownProps.path)
+      ? isEnabled(uischema, rootData, ownProps.path, getOrCreateAjv(state) )
       : ownProps.enabled);
   const controlElement = uischema as ControlElement;
   const id = ownProps.id;
@@ -702,15 +709,16 @@ export const mapStateToLayoutProps = (
   ownProps: OwnPropsOfLayout
 ): LayoutProps => {
   const rootData = getData(state);
+  const ajv = getOrCreateAjv(state);
   const { uischema } = ownProps;
   const visible: boolean =
     ownProps.visible === undefined || hasShowRule(uischema)
-      ? isVisible(ownProps.uischema, rootData, ownProps.path)
+      ? isVisible(ownProps.uischema, rootData, ownProps.path, getOrCreateAjv(state))
       : ownProps.visible;
   const readOnly = state.jsonforms.readOnly;
   const enabled: boolean =
     !readOnly && (ownProps.enabled === undefined || hasEnableRule(uischema)
-      ? isEnabled(ownProps.uischema, rootData, ownProps.path)
+      ? isEnabled(ownProps.uischema, rootData, ownProps.path, getOrCreateAjv(state))
       : ownProps.enabled);
 
   const data = Resolve.data(rootData, ownProps.path);
@@ -725,7 +733,8 @@ export const mapStateToLayoutProps = (
     data,
     uischema: ownProps.uischema,
     schema: ownProps.schema,
-    direction: ownProps.direction || layoutDefaultProps.direction
+    direction: ownProps.direction || layoutDefaultProps.direction,
+    ajv
   };
 };
 
@@ -800,7 +809,7 @@ const mapStateToCombinatorRendererProps = (
   );
   const visible: boolean =
     ownProps.visible === undefined || hasShowRule(uischema)
-      ? isVisible(uischema, getData(state), ownProps.path)
+      ? isVisible(uischema, getData(state), ownProps.path, getOrCreateAjv(state))
       : ownProps.visible;
   const id = ownProps.id;
 
diff --git a/packages/core/src/util/runtime.ts b/packages/core/src/util/runtime.ts
index ad773fb3df..9a74cbc2a4 100644
--- a/packages/core/src/util/runtime.ts
+++ b/packages/core/src/util/runtime.ts
@@ -36,8 +36,7 @@ import {
 import { resolveData } from './resolvers';
 import { composeWithUi } from './path';
 import { createAjv } from './validator';
-
-const ajv = createAjv();
+import { Ajv } from 'ajv';
 
 const isOrCondition = (condition: Condition): condition is OrCondition =>
   condition.type === 'OR';
@@ -59,16 +58,17 @@ const getConditionScope = (condition: Scopable, path: string): string => {
 const evaluateCondition = (
   data: any,
   condition: Condition,
-  path: string
+  path: string,
+  ajv: Ajv
 ): boolean => {
   if (isAndCondition(condition)) {
     return condition.conditions.reduce(
-      (acc, cur) => acc && evaluateCondition(data, cur, path),
+      (acc, cur) => acc && evaluateCondition(data, cur, path, ajv),
       true
     );
   } else if (isOrCondition(condition)) {
     return condition.conditions.reduce(
-      (acc, cur) => acc || evaluateCondition(data, cur, path),
+      (acc, cur) => acc || evaluateCondition(data, cur, path, ajv),
       false
     );
   } else if (isLeafCondition(condition)) {
@@ -86,18 +86,20 @@ const evaluateCondition = (
 const isRuleFulfilled = (
   uischema: UISchemaElement,
   data: any,
-  path: string
+  path: string,
+  ajv: Ajv
 ): boolean => {
   const condition = uischema.rule.condition;
-  return evaluateCondition(data, condition, path);
+  return evaluateCondition(data, condition, path, ajv);
 };
 
 export const evalVisibility = (
   uischema: UISchemaElement,
   data: any,
-  path: string = undefined
+  path: string = undefined,
+  ajv: Ajv
 ): boolean => {
-  const fulfilled = isRuleFulfilled(uischema, data, path);
+  const fulfilled = isRuleFulfilled(uischema, data, path, ajv);
 
   switch (uischema.rule.effect) {
     case RuleEffect.HIDE:
@@ -113,9 +115,10 @@ export const evalVisibility = (
 export const evalEnablement = (
   uischema: UISchemaElement,
   data: any,
-  path: string = undefined
+  path: string = undefined,
+  ajv: Ajv = createAjv()
 ): boolean => {
-  const fulfilled = isRuleFulfilled(uischema, data, path);
+  const fulfilled = isRuleFulfilled(uischema, data, path, ajv);
 
   switch (uischema.rule.effect) {
     case RuleEffect.DISABLE:
@@ -153,10 +156,11 @@ export const hasEnableRule = (uischema: UISchemaElement): boolean => {
 export const isVisible = (
   uischema: UISchemaElement,
   data: any,
-  path: string = undefined
+  path: string = undefined,
+  ajv: Ajv = createAjv()
 ): boolean => {
   if (uischema.rule) {
-    return evalVisibility(uischema, data, path);
+    return evalVisibility(uischema, data, path, ajv);
   }
 
   return true;
@@ -165,10 +169,11 @@ export const isVisible = (
 export const isEnabled = (
   uischema: UISchemaElement,
   data: any,
-  path: string = undefined
+  path: string = undefined,
+  ajv: Ajv = createAjv()
 ): boolean => {
   if (uischema.rule) {
-    return evalEnablement(uischema, data, path);
+    return evalEnablement(uischema, data, path, ajv);
   }
 
   return true;
diff --git a/packages/material/src/layouts/MaterialCategorizationLayout.tsx b/packages/material/src/layouts/MaterialCategorizationLayout.tsx
index 12fe185e62..cc4f1456b2 100644
--- a/packages/material/src/layouts/MaterialCategorizationLayout.tsx
+++ b/packages/material/src/layouts/MaterialCategorizationLayout.tsx
@@ -92,7 +92,8 @@ export class MaterialCategorizationLayoutRenderer extends RendererComponent<
       uischema,
       visible,
       enabled,
-      selected
+      selected,
+      ajv
     } = this.props;
     const categorization = uischema as Categorization;
     const value = this.hasOwnState() ? this.state.activeCategory : selected;
@@ -107,7 +108,7 @@ export class MaterialCategorizationLayoutRenderer extends RendererComponent<
       cells
     };
     const categories = categorization.elements.filter((category: Category) =>
-      isVisible(category, data)
+      isVisible(category, data, undefined, ajv)
     );
     return (
       <Hidden xsUp={!visible}>
diff --git a/packages/material/src/layouts/MaterialCategorizationStepperLayout.tsx b/packages/material/src/layouts/MaterialCategorizationStepperLayout.tsx
index f574ca9c2b..0866b3c442 100644
--- a/packages/material/src/layouts/MaterialCategorizationStepperLayout.tsx
+++ b/packages/material/src/layouts/MaterialCategorizationStepperLayout.tsx
@@ -82,7 +82,8 @@ export class MaterialCategorizationStepperLayoutRenderer extends RendererCompone
       uischema,
       visible,
       cells,
-      config
+      config,
+      ajv
     } = this.props;
     const categorization = uischema as Categorization;
     const activeCategory = this.state.activeCategory;
@@ -108,7 +109,7 @@ export class MaterialCategorizationStepperLayoutRenderer extends RendererCompone
       cells
     };
     const categories = categorization.elements.filter((category: Category) =>
-      isVisible(category, data)
+      isVisible(category, data, undefined, ajv)
     );
     return (
       <Hidden xsUp={!visible}>