This custom filter allows to set restriction model “Allow” (1) or “Block” (2) for the posts/pages edit restrictions add-on:
add_filter('ure_edit_posts_access_restriction_type', 'ure_edit_posts_access_set_restriction_type');
function ure_edit_posts_access_set_restriction_type($restriction_type) {
// $restriction_type = 1; // Allow
$restriction_type = 2; // Block
return $restriction_type;
}