Ultimate add-on for contact form 7 - conditional (custom validation)

if( function_exists( 'codeDropz_dnd_upload_cf7' ) ){
        remove_filter('wpcf7_validate_mfile*', array( codeDropz_dnd_upload_cf7(), 'dnd_upload_cf7_validation_filter' ), 10, 2 );
        add_filter('wpcf7_validate_mfile*', 'custom_cf7_validate_fields', 10, 2 );
    }

    function custom_cf7_validate_fields( $result, $tag ){

        // Don't validate if license-info is "TYPE IT IN"
        $condition = 'License-Info';
        if( isset( $_POST[ $condition ] ) && $_POST[ $condition ] == 'Type it in' ){
            return $result;
        }

        // Proceed with validation
        $multiple_files = ( isset( $_POST[ $tag->name ] ) ? array_map( 'sanitize_text_field', $_POST[ $tag->name ] ) : null );
        if( ( is_null( $multiple_files ) || count( $multiple_files ) == 0 ) && $tag->is_required() ) {
            $result->invalidate( $tag, wpcf7_get_message( 'invalid_required' ) );
            return $result;
        }

        return $result;
    }