We present 12 cases for you to decide; acceptable or unacceptable?
Arriving at the arena, Jason Kidd sports a nice suit and tie -- and an unshaven face.
Yao Ming shows former greats Bill Russell and Patrick Ewing how "business casual" is done in the 21st century.
During a Lakers game against the Spurs shortly prior to Super Bowl XXXIX, Philly native Kobe Bryant expressed his support for the Philadelphia Eagles and Donovan McNabb with a football jersey.
Billionaire businessman and Dallas Mavericks owner Mark Cuban can often be found on the sidelines in a T-shirt or jersey and jeans.
When it comes to living outside the new dress code, Rasheed Wallace has been a championship contender for years.
At a postgame press conference during the 2004 playoffs, Kevin Garnett wore a collared dress shirt and sweater that would meet the new guidelines.
Chauncey Billups and Richard Hamilton, as shown, got ready for Game 7 of the Eastern Conference finals in very different ways.
NBA MVP Steve Nash and his pal, German superstar Dirk Nowitzki, have often appeared in far-from-businesslike attire.
Big and tall: Going well beyond "business casual," Shaq is known for sporting some of the fanciest duds in the business.
The new dress code runs directly counter to Allen Iverson's usual appearance.
Larry Brown might want his players to play his way, but he likely won't encourage them to dress the way he's shown here, in a hockey sweater.