Move Conditional Checkout Fields With WooCommerce Hooks

functions.php

<?php
/*
 * This has not been tested, but should work in theory. Use with care.
 */

/* 
 * Remove the default WooCommerce Action
 * Valid actions include:
 * woocommerce_before_checkout_billing_form
 * woocommerce_after_checkout_billing_form
 * woocommerce_before_checkout_shipping_form
 * woocommerce_after_checkout_shipping_form
 * woocommerce_before_order_notes
 * woocommerce_after_order_notes
 * Use the action that is appropriate for the setting selected in WooCommerce > Conditional Fields
 */
remove_action( 'woocommerce_after_order_notes', 'conditional_checkout_field_pro' );

/* 
 * Add the action back where needed.
 * Use the appropriate action from the multistep checkout plugin in the first part (woocommerce_multistep_checkout_before_order_info)
 * Use the same function name from above in the second part (conditional_checkout_field_pro) to ensure the correct function is being called here.
 */
add_action( 'woocommerce_multistep_checkout_before_order_info', 'conditional_checkout_field_pro' );