Travellers who pay for their own spacewalk are referred to as spaceflight by Roscosmos and NASA, sometimes referred to as “space tourists,” a term they generally don`t like. All seven were transported to the ISS by Russian Soyuz spacecraft. If professional crews change into numbers that are not divisible by the three seats of a Soyuz, and if a short-term crew member is not sent, the MirCorp seat will be sold by Space Adventures. When the space shuttle was withdrawn in 2011 and the size of the station`s crew was reduced to six, space tourism was halted as partners needed Russian transport seats to access the station. Soyuz flight plans increased after 2013, requiring five Soyuz flights (15 seats) with only two expeditions (12 seats).  The remaining seats are sold for approximately $40 million to members of the public who can pass a medical examination. ESA and NASA criticized private space at the beginning of the ISS, and NASA initially opposed the training of Dennis Tito, the first to be paid for his own visit to the ISS. [b] A third layer consists of the exchange of contractual agreements or the trading of partners` rights and obligations, including the 2005 framework agreement between NASA and Roscosmos, which defines the conditions under which NASA acquires seats on Soyuz crew carriers and cargo capabilities on Progress unmanned carriers. It is therefore doubtful that the ISS will make a significant contribution to society, unlike the broader space program. Some proponents argue that in addition to its scientific value, it is an important example of international cooperation.
 Others argue that the ISS is an advantage that, if used correctly, could enable economic missions of the Moon and Mars.  On 15 November 2016, Vladimir Director General Solntsev of RSC Energia said of the extension of the ISS: “Perhaps the ISS will receive additional funding. Today we discussed the possibility of using the station until 2028,” with discussions that will continue under the new presidential administration. [Citation required] Proposals were also made that the station could be converted into commercial operation after being removed from state service.  Dr. Alexander V. Yakovenko is deputy permanent representative of the Russian Federation to international organizations in Vienna. Head of the Russian delegation to the UN Committee on peaceful uses of space (COPUOS).