The Open Spaces Agreements (ASA) are a kind of legal agreement established by the National Aeronautics and Space Act of 1958 (and subsequent congressional authorizations) authorizing NASA to cooperate in a single way with any entity authorizing the execution of the government`s mandate. Only at the time of approval of (Pub.L. 111-314 (text) (pdf)): the Agency includes SAAs with various partners to advance the objectives of the NASA mission and program, including international space cooperation activities.  So far, NASA has released a list of progress bricks made solely for SpaceDev and the same Dream Chaser spacecraft is also one of the winners (albeit with different stages) of the CCDev 1 and 2  towers in addition to these two initiatives, NASA has entered into five other agreements under the Commercial Space Transportation Capabilities (CSTC). [unverified in body] Five agreements were signed between January 2007 and June 2007: Four of the cooperation agreements signed in 2010 have a maximum period of three years. In the fifth, SpaceDev, the period is censored.  The three Initiatives of the Space Act Agreement, COTS, CSTC and CCDev, are for the development, construction and experimentation of design concepts, but CSEC differs from the other two initiatives because no funding is provided. CSTC agreements are merely instruments that require NASA to strengthen cooperation and provide information and other entities to private sector companies, but this obligation has no financial impact and both parties (nasa and private companies) should themselves guarantee the necessary resources to their respective parts of their activities.  Such agreements have been concluded within the framework of Commercial Orbital Transport Services (COTS) and Commercial Crew Development (CCDev)[when?]. They are not subject to normal federal acquisition rules. .