Default new WP posts to require level 1 with Paid Memberships Pro.

default_new_posts_to_level1.php

<?php   // do not copy this line.
/**
 * This recipe does will Check to require level 1 by default (or whatever level you choose).
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
/*
	Check to require level 1 by default.
	
	Add this code to a custom plugin or
	your active theme's functions.php.
	
	Change #in-membership-level-1 in the JS code to check a different level.
*/
function default_new_posts_to_level1()
{
	$screen = get_current_screen();	
	if(!empty($screen) && $screen->action == "add" && $screen->base == "post" && in_array($screen->post_type, array("post", "page")))
	{
	?>
	<script>
		//change the -1 there to -2 or -3 etc to check a different membership level
		jQuery('#in-membership-level-1').prop('checked', true);
	</script>
	<?php	
	}	
}
add_action('admin_footer', 'default_new_posts_to_level1');