"In areas of space where there is a large concentration of advanced nations, one will usually find a great deal of trade going on. This trade would be carried on through established trade routes that are marked in space and are delineated by coordinates with other known planets and systems."
"There is long-range travel and trade, but only on established routes where security has been provided amongst member states, members in the organizations that run and oversee these routes of trade. If you are not part of such an association, you would not have access to these avenues of travel. Any attempt to travel outside of these avenues is considered very risky, for outside the routes of trade, there is the illegal trade, and here there is much danger to one’s security." 
"Within this neighborhood are many powerful nations that have created vast networks of trade and commerce that are tightly governed. Most nations in this region of space are dependent on these networks for the essential resources they need to support their technology and, in some cases, essential resources just to provide the basic requirements of life." 
Problems with Trade Among Extraterrestrial Races
"Many nations in the Greater Community have united with others to create networks of trade. But even within these networks there are problems of trust, problems regarding espionage and certainly problems in dealing with the influence of outside forces." 
"In all, it is a very complex situation. Strict rules of conduct have been established in order to maintain stability and to avoid any breakdown in the functioning of trade and commerce. These rules are often maintained by courts and are supported by security forces with an emphasis on honesty. Here corruption is certainly a problem."