policy number and date
$meta_query = array( 'relation' => 'AND', array( 'key' => 'insurance_policy_number', 'compare' => 'EXISTS', ), array( 'key' => 'insurance_effective_date', 'compare' => 'EXISTS', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => 'insurance_policy_number', 'compare' => 'EXISTS', ), array( 'key' => 'insurance_effective_date', 'compare' => 'EXISTS', ), );