The NBA league office has left basketball decision-makers out of the loop on how things will work this season, leading to widespread frustration around the league, according to multiple executives that spoke with ESPN.

Training camp will begin in just 18 days while free agency opens in one week.

"I'd love to be able to tell you something, but I don't know anything," one Western Conference executive told ESPN. "I find out everything from the media."

The league expedited the start of the season in order to preserve between $500 million and $1 billion in revenue.

"We know it's hard, and they're working on a lot of details," one team president said. "They are listening to a lot of feedback from all of us. But at times we feel like we're in the dark and that can get frustrating."

Teams have been scrambling with concerns ranging from player health to uncertain safety protocols all while trying to build rosters over a condensed period.

"Nobody knows the rules," another executive said, "and [the league] is making it up as it goes along."

"Everything is happening last minute, in a short period of time," an Eastern Conference executive said. "There's not much time to think through things."