Snippet to hide all ups rates apart from access point economy. If Access point has been selected. WOOCOMMERCE UPS SHIPPING PLUGIN WITH PRINT LABEL - https://www.pluginhive.com/product/woocommerce-ups-shipping-plugin-with-print-label/

functions.php

/**
 * Snippet to hide all ups rates apart from access point economy. If Access point has been selected. 
 * Created at : 12 Sep 2018
 * Updated at : 12 Sep 2018
 * PluginHive Plugins : https://www.pluginhive.com/
 * Gist Link : https://gist.github.com/varun-pluginhive/0fff2c5a078192748aff1627756b862d
 */
if( ! function_exists('ph_hide_ups_rates_apart_from_access_point_economy') ) {
	function ph_hide_ups_rates_apart_from_access_point_economy( $rates ) {
		$access_point = WC()->session->get('ph_ups_selected_access_point_details');
		if( ! empty($access_point) ) {
			foreach( $rates as $key => $rate) {
				$method_id = $rate->get_method_id();
				if( $method_id == 'wf_shipping_ups') {
					$shipping_id = $rate->get_id();
					if( $shipping_id != 'wf_shipping_ups:70')	unset($rates[$key]);
				}
			}
		}
		return $rates;
	}
	add_filter( 'woocommerce_package_rates', 'ph_hide_ups_rates_apart_from_access_point_economy');
}