The size of a players base shall not exceed 150 parts. Each time the server restarts it will count the number of base components used to build each base for each base owner. The parts that are counted includes both Vanilla base components and RAG Base Building components. More components may be added in the future.

You can see the number of parts used for each base in the base owner's player profile on the website. There is also a list on the website that shows the top part counts per base owner per server.

Bases that exceed the 150 part limit will be dismantled to bring the part count into compliance.