This is my take on a previous suggestion about this.
Throughout N1 and N2, there have been no rules about stealing the design of a ship. There have been rules about stealing ships from claims, but never has the design of a ship itself been protected.
Every Movecrafter knows more time and labour goes into designing a good ship than building it. Having a single ship captured by anyone on CCNet guarantees that it will be mass produced in a shipyard until the end of time. There's no incentive for people to learn Movecraft when you can infinitely clone and there's no incentive for many shipbuilders to put in more than the bare minimum in terms of ship looks because in a way you're building for other people.
This is bad for the economy too because it has killed off the idea of shipbuilding as an industry. You only need to buy one ship from a shipbuilder and then you can print it forever even if you weren't sold the rights to the actual design. Even worse, you can literally mass produce and resell the ship yourself and undercut the original shipbuilder's prices. There's no good reason to become a commerical shipbuilder and that's a real, real shame.
To summarize, ship design copying on ccnet is a big problem for a lot of shipbuilders, discourages learning Movecraft and building ships yourself and has destroyed what would've been an interesting part of the economy. It doesn't benefit anyone except people who cant be bothered to learn Movecraft or train / hire people who have.
On to the actual rule. It should be illegal to copy ships that you haven't been given or sold the design rights to, IF the design has been registered. You can keep stolen ships and looks at their systems but you cant reproduce or copy them IF the design has been registered. How should the ship registration work? If you go to the resources page on this website there's literally an empty "Ships" tab. Rename that to "Ship Designs" and voilà. Alternately, the dead forums could be used. Upload pictures of the ship, give it a description, keep a list of people who have permission to it. That lets players and the staff easily track designs and who has access to them and it's free eye candy for ship enthusiasts too.
But who has the rights own and register a ship design. I am going to shamelessly copy this from another server but it's a good solution. "To call ship your own, you must remove every existing block of the old ship. The player that *originally* begins building the ship decides who has rights (or who has access to) to the blueprint of the ship."
In my opinion ship design rules shouldn't apply to cogs, harvesters and the other tiny and pointless crafts to avoid spam, it should only apply to the big ships that people care about.
To be crystal clear. This is NOT a suggestion to ban piracy. This IS a suggestion to stop mass reproduction of ship designs that have been registered in a proper way. Thank you.