From Jayski.com:

Richert's contract with DEI includes unique confidentiality, charity clauses: Dale Earnhardt Inc. required crew chief Doug Richert to endorse the Dale Earnhardt Foundation and required him to keep information learned about the Earnhardt family while he was a crew chief confidential as part of his contract with the team. The contract was entered as an exhibit to a lawsuit DEI filed in North Carolina court to rule that it had proper cause to fire Richert earlier this season and no longer owes money to him. DEI filed the complaint July 18 in North Carolina Superior Court. DEI fired Richert after the Richmond race this year, and its complaint states that it has received notification from Richerts attorney claiming a breach of contract. The DEI complaint states that Richerts 2008 salary was $475,000 plus $50,000 in guaranteed bonuses. It said it fired Richert for poor performance of the car, his failure to work with the other crew chiefs and for not following procedure in ordering parts. DEI Vice President John Story said he could not comment on the suit. Richert did not immediately return a phone message seeking comment. Richert had signed a three-year deal with DEI last December to be the crew chief of the #01 team, driven by Regan Smith this year. He has a nine-month non-compete clause following termination of the contract. The contract appears fairly typical for crew chiefs and includes a confidentiality section over technical data as well as a morals clause.
But there are a few items unique to DEI:


In the confidentiality section, confidential information includes all personal and/or non-public matters relating to Teresa Earnhardt, Dale Earnhardt, or their families, experiences or circumstances gathered during his employment. Richert also was not allowed to write a book, short story, article or screenplay based on his experiences and cannot participate in any interviews relating to DEI, Teresa Earnhardt, Dale Earnhardt and their families. He was allowed to do at-track interviews that focus on the car or drivers and their performance as it relates to the race.


Richert also agreed to a clause to endorse the Dale Earnhardt Foundation, and the Dale Earnhardt Foundation shall be the primary, non-religious charity to which Employee principally devotes Employees support and the time Employee spends on charitable matters. He also agreed to do free appearances on behalf of the Dale Earnhardt Foundation.(SceneDaily)(7-31-2008)