[member="Visenya D'alaetos"]
The factory and the codex are both entirely optional unless you are requested by a role-playing judge or Admin to submit something to either, in the instance that you are reported for abusing something (such as a stealth generator or something that is used to completely bypass all forms of detection). As such you don't need to submit things like ships, lightsabers, guns, locations, and so on - I've never submitted a location, actually. if you do submit something to either places you will need to follow the templates for each submission, and there are certain rules on submitting ships to the factory - no player may own their own private ship over the size of 400 m, for example. If you wish to submit a ship over 1000 meters you will need a 10 post development thread minimum, as well as an applicable company to produce them or a faction. You do not necessarily need a shipyard, though it is something that does help shipbuilding companies such as Kuat Drive, Rendili Drive, and so on.
Feel free to use an YT freighter or TIE Fighter or anything of the like from canon, or visit any city you can imagine - all without submitting to either place. I would suggest not submitting a location to the codex until you've fleshed out such a city through role-play anyways, as it helps with the submission.