public static function get_rates_for_tax_class( $tax_class ) {
		global $wpdb;

		// Get all the rates and locations. Snagging all at once should significantly cut down on the number of queries.
		$rates     = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM `{$wpdb->prefix}woocommerce_tax_rates` WHERE `tax_rate_class` = %s;", sanitize_title( $tax_class ) ) );
		$locations = $wpdb->get_results( "SELECT * FROM `{$wpdb->prefix}woocommerce_tax_rate_locations`" );

		if ( ! empty( $rates ) ) {
			// Set the rates keys equal to their ids.
			$rates = array_combine( wp_list_pluck( $rates, 'tax_rate_id' ), $rates );
		}

		// Drop the locations into the rates array.
		foreach ( $locations as $location ) {
			// Don't set them for unexistent rates.
			if ( ! isset( $rates[ $location->tax_rate_id ] ) ) {
				continue;
			}
			// If the rate exists, initialize the array before appending to it.
			if ( ! isset( $rates[ $location->tax_rate_id ]->{$location->location_type} ) ) {
				$rates[ $location->tax_rate_id ]->{$location->location_type} = array();
			}
			$rates[ $location->tax_rate_id ]->{$location->location_type}[] = $location->location_code;
		}

		foreach ( $rates as $rate_id => $rate ) {
			$rates[ $rate_id ]->postcode_count = isset( $rates[ $rate_id ]->postcode ) ? count( $rates[ $rate_id ]->postcode ) : 0;
			$rates[ $rate_id ]->city_count     = isset( $rates[ $rate_id ]->city ) ? count( $rates[ $rate_id ]->city ) : 0;
		}

		$rates = self::sort_rates( $rates );

		return $rates;
	}