According to Sports Business Journal, Ryan Smith, owner of the NHL's Utah Hockey Club and NBA's Utah Jazz, is close to a deal with Salt Lake City to keep both teams at Delta Center for the next 30 years.
If either of Utah Hockey Club or the Utah Jazz play a home regular season game not at Delta Center, whether it be an outdoor game or game in Europe for the NHL for example, they'll face significant fines from the city.
To combat this however, if Utah is to ever participate in an outdoor game in the state or play abroad as part of the NHL Global Series, they'll likely have to be designated as the 'away' team. This is similar to a deal that the New York Rangers have with Madison Square Garden that required them to be the 'away' team during a pair of outdoor games at Yankee Stadium back in 2014.