In addition, Humby and Gill would be entitled to have their outstanding share options bought out by the Americans. Gill's options would trigger a payment of around £735,000 and Humby would get around £360,000.
The directors also have more than 500,000 shares provisionally awarded under the board's long-term incentive plan. It is not clear whether the directors would receive compensation for them as well.
Gill received remuneration worth almost £1.2 million last year, making him one of the best paid directors in British football.
The company's annual accounts reveal that he got a base salary of £435,000, topped up by a cash bonus of £270,000, shares worth £185,000 and benefits of £19,000. The total pay package is almost double the £507,000 he received for 2003.
He also cashed in 400,000 share options for a profit of £284,000.