Midnight tonight.

That’s when the NBA’s current collective bargaining agreement — the complex document that set forth the existing rules between the owners and the players — is scheduled to expire.

And, if the owners and the National Basketball Players Association don’t make significant progress today in their talks and reach some kind of deadline extension, the owners are expected to impose a lockout on the players.

So, what would be the immediate impact of a lockout, especially here in Orlando?

What a lockout would change:
Magic players would be barred from entering the team’s practice facility and basketball-operations offices at Amway Center. No more workouts at the arena. No more shooting sessions. Therefore, J.J. Redick and Quentin Richardson, who have had surgeries since late-May, will have to go elsewhere to do their rehabilitation work.

• Magic employees — even head coach Stan Van Gundy and even athletic trainer Keon Weise — will not be allowed to have any contact with players. No phone calls. No face-to-face conversations. No text messages.

• Players will have to train on their own. Many already have made logistical arrangements, such as finding an available basketball court and finding people who can rebound the ball during shooting drills.

• The summer league that the Magic host each year officially will be canceled, hindering the development of young players such as rookies Justin Harper and DeAndre Liggins, who were acquired during last week’s NBA draft.

• The cancellation of the summer league would have an adverse economic impact on Central Florida businesses. Seven teams travel in from out of town to participate in the league, with each team having perhaps 20 people in its traveling party. Agents, scouts from other teams and basketball executives from other teams typically attend the exhibition games. In the event of a cancellation, all of those people would have no reason to visit the Orlando area in early July; therefore, they won’t be staying in local hotels, renting cars and eating in local restaurants.

• The NBA’s typical free agency period, which usually begins in July, will be on indefinite hold. Teams will not be permitted to make any trades or any roster moves of any kind until a new CBA has been agreed upon and goes into effect.

What a lockout would not change:
• To the DeVos family’s credit, full-time jobs within the Magic organization will be safe. The Magic have no layoffs planned for full-time employees.

• The Magic will continue to accept ticket orders for the 2011-12 season. In February, the Orlando Sentinel learned that people who buy tickets will have an option to receive refunds with interest for any canceled games if labor negotiations drag into the season. The possibility of a work stoppage apparently hasn’t slowed ticket sales. The team has sold 1,200 new season tickets since the postseason ended, and the team’s season-ticket base is slightly over 14,000.

• Any NBA players who are still owed money for the 2010-11 season will continue to get paid.

Follow Josh Robbins on Twitter at @JoshuaBRobbins and e-mail him at jrobbins@orlandosentinel.com. Subscribe to our Orlando Magic newsletter at OrlandoSentinel.com/joinus.