Negotiations over a new contract are expected to start in the next few weeks.

There was, for example, the dispute over his contract last spring.

He was also unhappy with the organization over his previous contract.

United and the airport were involved in a dispute over United's contract.

They began spring training this year with a boycott by the star over his contract.

The board ordered the company to bargain over a new contract.

Now he is at odds with the principals' union over its contract.

The pair have already had initial talks over a new contract.

"It will be the largest rally over a contract that this city has ever seen."

They added that talks were already ongoing over a contract for 2013.