Pursuant to a congressional request, GAO reviewed the National Aeronautics and Space Administration's (NASA) compliance with its regulations on: (1) the delegation of contract administration functions; (2) communication with the Defense Contract Management Command (DCMC) on delegated contract administration functions; and (3) the coordination of DCMC work. GAO found that: (1) although the NASA Federal Acquisition Regulation Supplement (FARS) requires NASA centers to conduct a conference with DCMC delegatees to plan contract administration activities on contracts expected to exceed $5 million, NASA centers have not conducted such conferences with DCMC on 88 percent of the contracts reviewed that exceeded $5 million; (2) although NASA FARS requires NASA to send letters to delegatees identifying their responsibilities within 15 days after the contract award, for 36 percent of the contracts reviewed, NASA did not send the letters within 15 days and, in almost 40 percent of those contracts, NASA either took months to send the letters or did not send them at all; (3) although NASA FARS requires NASA to send instructions to delegatees in certain circumstances, the centers failed to send those letters in about 30 percent of the reviewed contracts that required such instructions; (4) since NASA instructions in its delegation letters to DCMC generally do not specify which of the 77 contract administration functions it has delegated to DCMC, DCMC has to infer from the delegation letters' regulation references which contract activities apply; (5) for over half of the 119 contracts reviewed, the centers could not document whether DCMC had accepted responsibility for a delegated contract and whom to contact at DCMC to discuss contract issues, since DCMC either did not timely send acceptance letters or did not send them at all; (6) the centers did not routinely notify DCMC of contract modifications; (7) NASA was often unaware that its contracts had been delegated to DCMC; and (8) NASA has negotiated with DCMC to revise the billing format and system, since it was having difficulties assessing the accuracy of DCMC bills. GAO also found that NASA identified contract management as a material weakness under the Federal Managers' Financial Integrity Act and recently changed its regulations and procedures to address most of the identified problems.