Perhaps the duty is articulated best in a old case from the Armed Services Board of Contract Appeals (ASBCA). In G.W. Galloway, ASBCA Nos. 16656, 16975, 73-2 BCA paragraph 10,207, the Board said:
This requirement is an integral segment of the broadly recognized rule applicable to all government contracts which imposes an implied obligation on the government that it must do nothing that will interfere with the contractor in the performance of the contract. [citation omitted] In addition to the negative obligation of noninterference, this board has recognized an implied affirmative obligation on the part of the government that it will do whatever is reasonably necessary on its part to enable the contractor to perform.73-2 BCA at 48,499,
The duty to cooperate includes the duty to communicate and disclose information vital to contract performance.
Good contract management requires the contractor to importune the government, if necessary, to obtain clear directions when problems arise such as government caused delays and constructive changes. The duty works both ways. The contractor has the duty to notify the government of the performance restricting occurrence and the government has the duty to "do whatever is reasonably necessary on its part to enable the contractor to perform."