dept page tax query
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'tax-DEPT_ID', 'terms' => 'PAGE-SLUG', 'field' => 'slug', ), );
$tax_query = array( 'relation' => 'AND', array( 'taxonomy' => 'tax-DEPT_ID', 'terms' => 'PAGE-SLUG', 'field' => 'slug', ), );