This excerpt taken from the TXRH DEF 14A filed Apr 19, 2007.
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
The audit committees charter provides that the audit committee will review and approve any transactions between us and any of our executive officers, directors and 5% stockholders, or any members of their immediate families, in which the amount involved exceeds the threshold limits established by the regulations of the Securities and Exchange Commission. In reviewing a related-party transaction, the audit committee considers the material terms of the transaction, including whether the terms are generally available to an unaffiliated third party under similar circumstances. Except as specifically noted, the transactions described below were entered into prior to our IPO, and we were contractually obligated to perform under these agreements prior to the formation of the audit committee.
This excerpt taken from the TXRH 10-K filed Mar 7, 2006.