Argentina provinces

If you are from Argentina, here is the code to add at "address.inc" file.

ISO 3166-2

  else if ($address['country'] == 'AR') {
    $format['locality_block']['administrative_area']['#options'] = array(
      '' => t('-Seleccione una opción-'),
      'AR-B' => t('Buenos Aires'),
      'AR-K' => t('Catamarca'),
      'AR-H' => t('Chaco'),
      'AR-U' => t('Chubut'),
      'AR-X' => t('Córdoba'),
      'AR-W' => t('Corrientes'),
      'AR-E' => t('Entre Ríos'),
      'AR-P' => t('Formosa'),
      'AR-Y' => t('Jujuy'),
      'AR-L' => t('La Pampa'),
      'AR-F' => t('La Rioja'),
      'AR-M' => t('Mendoza'),
	  'AR-N => t('Misiones'),
	  'AR-Q' => t('Neuquén'),
	  'AR-R' => t('Río Negro'),
	  'AR-A' => t('Salta'),
	  'AR-J' => t('San Juan'),
	  'AR-D' => t('San Luis'),
	  'AR-Z' => t('Santa Cruz'),
	  'AR-S' => t('Santa Fe'),
	  'AR-G' => t('Santiago del Estero'),
	  'AR-V' => t('Tierra del Fuego, Antártida e Islas del Atlántico Sur'),
	  'AR-T' => t('Tucumán'),
    );
    $format['locality_block']['administrative_area']['#title'] = t('Provincia');
  }