diff --git a/header-validation/README.md b/header-validation/README.md
index 64db0a7..c166605 100644
--- a/header-validation/README.md
+++ b/header-validation/README.md
@@ -2,12 +2,6 @@
 
 The Attribution Reporting Header Validation tool validates the header responses related to Attribution Reporting API. This document shows how to set up and run the tool.
 
-## Setup
-
-```sh
-npm install && npm run build && npm run test
-```
-
 Interactive form is deployed at: https://privacysandbox.github.io/measurement-simulation/validate-headers
 
 Select the type of response you want to validate:
@@ -16,6 +10,16 @@ Select the type of response you want to validate:
 
 `Validation Result` section shows any errors or warnings if your data is invalid.
 
+## Local Setup
+
+Run the following command from the `header-validation` sub-directory:
+
+```sh
+npm install && npm run build && npm run test
+```
+
+Ensure that the above command runs successfully. Now, open `validate-headers.html` on your web browser and you should be able to validate your header spec locally.
+
 ## Feedback
 
 If you have any feedback while using the Header Validation tool, please
diff --git a/header-validation/src/index.js b/header-validation/src/index.js
index cd67e57..2fe7b38 100644
--- a/header-validation/src/index.js
+++ b/header-validation/src/index.js
@@ -5,19 +5,6 @@ const {validateTrigger} = require('./validate_trigger');
 const validationForm = document.getElementById('validation-form');
 const inputTextbox = document.getElementById('input-text');
 const headerOptions = validationForm.elements.namedItem('header');
-const featureLookbackWindowFilter = validationForm.elements.namedItem('feature-lookback-window-filter');
-const featureTriggerDataMatching = validationForm.elements.namedItem('feature-trigger-data-matching');
-const featureCoarseEventReportDestinations = validationForm.elements.namedItem('feature-coarse-event-report-destination');
-const featureSharedSourceDebugKey = validationForm.elements.namedItem('feature-shared-source-debug-key');
-const featureXNA = validationForm.elements.namedItem('feature-xna');
-const featureSharedFilterDataKeys = validationForm.elements.namedItem('feature-shared-filter-data-keys');
-const featurePreinstallCheck = validationForm.elements.namedItem('feature-preinstall-check');
-const featureAttributionScopes = validationForm.elements.namedItem('feature-attribution-scopes');
-const featureAggregationCoordinatorOrigin = validationForm.elements.namedItem('feature-aggregation-coordinator-origin');
-const featureSourceRegistrationTimeOptionalForAggReports = validationForm.elements.namedItem('feature-source-registration-time-optional-for-agg-reports');
-const featureTriggerContextId = validationForm.elements.namedItem('feature-trigger-context-id');
-const featureEnableUpdateTriggerHeaderLimit = validationForm.elements.namedItem('feature-enable-update-trigger-header-limit');
-const featureEnableReinstallReattribution = validationForm.elements.namedItem('feature-enable-reinstall-reattribution');
 const copyButton = document.getElementById('linkify');
 const errorList = document.getElementById('errors');
 const warningList = document.getElementById('warnings');
@@ -35,19 +22,6 @@ async function copyLink() {
   url.search = '';
   url.searchParams.set('header', headerOptions.value);
   url.searchParams.set('json', inputTextbox.value);
-  url.searchParams.set('feature-lookback-window-filter', featureLookbackWindowFilter.checked.toString());
-  url.searchParams.set('feature-trigger-data-matching', featureTriggerDataMatching.checked.toString());
-  url.searchParams.set('feature-coarse-event-report-destination', featureCoarseEventReportDestinations.checked.toString());
-  url.searchParams.set('feature-shared-source-debug-key', featureSharedSourceDebugKey.checked.toString());
-  url.searchParams.set('feature-xna', featureXNA.checked.toString());
-  url.searchParams.set('feature-shared-filter-data-keys', featureSharedFilterDataKeys.checked.toString());
-  url.searchParams.set('feature-preinstall-check', featurePreinstallCheck.checked.toString());
-  url.searchParams.set('feature-attribution-scopes', featureAttributionScopes.checked.toString());
-  url.searchParams.set('feature-aggregation-coordinator-origin', featureAggregationCoordinatorOrigin.checked.toString());
-  url.searchParams.set('feature-source-registration-time-optional-for-agg-reports', featureSourceRegistrationTimeOptionalForAggReports.checked.toString());
-  url.searchParams.set('feature-trigger-context-id', featureTriggerContextId.checked.toString());
-  url.searchParams.set('feature-enable-update-trigger-header-limit', featureEnableUpdateTriggerHeaderLimit.checked.toString());
-  url.searchParams.set('feature-enable-reinstall-reattribution', featureEnableReinstallReattribution.checked.toString());
   await navigator.clipboard.writeText(url.toString());
 }
 
@@ -67,19 +41,19 @@ function populateUIList(element, items) {
 function validate() {
   // Fetch Flag Values
   let flagValues = {};
-  flagValues['feature-lookback-window-filter'] = featureLookbackWindowFilter.checked;
-  flagValues['feature-trigger-data-matching'] = featureTriggerDataMatching.checked;
-  flagValues['feature-coarse-event-report-destination'] = featureCoarseEventReportDestinations.checked;
-  flagValues['feature-shared-source-debug-key'] = featureSharedSourceDebugKey.checked;
-  flagValues['feature-xna'] = featureXNA.checked;
-  flagValues['feature-shared-filter-data-keys'] = featureSharedFilterDataKeys.checked;
-  flagValues['feature-preinstall-check'] = featurePreinstallCheck.checked;
-  flagValues['feature-attribution-scopes'] = featureAttributionScopes.checked;
-  flagValues['feature-aggregation-coordinator-origin'] = featureAggregationCoordinatorOrigin.checked;
-  flagValues['feature-source-registration-time-optional-for-agg-reports'] = featureSourceRegistrationTimeOptionalForAggReports.checked;
-  flagValues['feature-trigger-context-id'] = featureTriggerContextId.checked;
-  flagValues['feature-enable-update-trigger-header-limit'] = featureEnableUpdateTriggerHeaderLimit.checked;
-  flagValues['feature-enable-reinstall-reattribution'] = featureEnableReinstallReattribution.checked;
+  flagValues['feature-lookback-window-filter'] = true;
+  flagValues['feature-trigger-data-matching'] = true;
+  flagValues['feature-coarse-event-report-destination'] = true;
+  flagValues['feature-shared-source-debug-key'] = true;
+  flagValues['feature-xna'] = true;
+  flagValues['feature-shared-filter-data-keys'] = true;
+  flagValues['feature-preinstall-check'] = true;
+  flagValues['feature-attribution-scopes'] = false;
+  flagValues['feature-aggregation-coordinator-origin'] = true;
+  flagValues['feature-source-registration-time-optional-for-agg-reports'] = false;
+  flagValues['feature-trigger-context-id'] = false
+  flagValues['feature-enable-update-trigger-header-limit'] = false;
+  flagValues['feature-enable-reinstall-reattribution'] = true;
   flagValues['max_attribution_filters'] = 50;
   flagValues['max_bytes_per_attribution_filter_string'] = 25;
   flagValues['max_values_per_attribution_filter'] = 50;
@@ -97,7 +71,7 @@ function validate() {
   flagValues["max_report_states_per_source_registration"] = (1n << 32n) - 1n;
   flagValues["max_trigger_context_id_string_length"] = 64;
   flagValues["max_bucket_threshold"] = (1n << 32n) - 1n;
-  flagValues["max_filter_maps_per_filter_set"] = 5;
+  flagValues["max_filter_maps_per_filter_set"] = 20;
   flagValues["max_aggregate_keys_per_trigger_registration"] = 50;
   flagValues["max_sum_of_aggregate_values_per_source"] = 65536;
   flagValues["max_aggregate_deduplication_keys_per_registration"] = 50;
diff --git a/header-validation/validate-headers.html b/header-validation/validate-headers.html
index 5e248a1..8ba02f9 100644
--- a/header-validation/validate-headers.html
+++ b/header-validation/validate-headers.html
@@ -23,21 +23,6 @@ <h1>Attribution Reporting Header Validation</h1>
                 <!--Header Type-->
                 <p><label><input type=radio name=header value=source checked><code>Attribution-Reporting-Register-Source</code></label>
                 <p><label><input type=radio name=header value=trigger><code>Attribution-Reporting-Register-Trigger</code></label>
-                <!--Additional Feature Selection-->
-                <p>Flags
-                <p><label><input type=checkbox name=feature-lookback-window-filter>Measurement Enable Lookback Window Filter</label>
-                <p><label><input type=checkbox name=feature-trigger-data-matching checked>Measurement Enable Trigger Data Matching</label>
-                <p><label><input type=checkbox name=feature-coarse-event-report-destination checked>Measurement Coarse Event Report Destination</label>
-                <p><label><input type=checkbox name=feature-shared-source-debug-key checked>Measurement Enable Shared Source Debug Key</label>
-                <p><label><input type=checkbox name=feature-xna>Measurement Enable XNA</label>
-                <p><label><input type=checkbox name=feature-shared-filter-data-keys checked>Measurement Enable Shared Filter Data Keys (XNA)</label>
-                <p><label><input type=checkbox name=feature-preinstall-check>Measurement Enable Preinstall Check</label>
-                <p><label><input type=checkbox name=feature-attribution-scopes>Measurement Enable Attribution Scopes</label>
-                <p><label><input type=checkbox name=feature-aggregation-coordinator-origin checked>Measurement Aggregation Coordinator Origin</label>
-                <p><label><input type=checkbox name=feature-source-registration-time-optional-for-agg-reports>Measurement Source Registration Time Optional For Aggregate Reports</label>
-                <p><label><input type=checkbox name=feature-trigger-context-id>Measurement Enable Trigger Context Id</label>
-                <p><label><input type=checkbox name=feature-enable-update-trigger-header-limit>Measurement Enable Update Trigger Header Limit</label>
-                <p><label><input type=checkbox name=feature-enable-reinstall-reattribution>Measurement Enable Reinstall Reattribution</label>
             </fieldset>
 
             <!--Output Results-->
@@ -61,4 +46,4 @@ <h1>Attribution Reporting Header Validation</h1>
 
     <!--Load Webpage Script-->
     <script src="./dist/main.js"></script>
-</body>
\ No newline at end of file
+</body>