Imported calender (*.ics) all time in sync?

Hi, I imported an external calender by adding the URL to the *.ics file. This calender is maintained by another person (time and date of football games). With Google calender this was an abbonoment, means up to date all the time the calender changed. Is this the case here too? I use Nextcloud 13. Or do I need to import this URL manually every time again?