The accused player clearly broke the following rules:

4.2 Base Appearance - Bases must not have flickering effects, invisible or anything difficult to the eye. Anyone entering the base must be able to see where they are going. No completely blacked out rooms the black material can only be used on one wall. Transparency can not be lower than 170% / units on the color/colour slider. Your base should not stop vehicle access on the roads, vehicles should be able to pass with ease. Excluding district bases.


4.8 Propblock - You may prop block any other entrances to a base as long as you have one. You may prop block parts of your base that you are not using as long as you void access to them, and no entities are stored there.


4.30 Printers - You're not allowed to have Printers, Drugs or any raid-able entities higher than 2 Stories/Floors high OUTSIDE. No Printing on top of the Car Dealership, Government Building (SPAWN), Hospital or Police station. & No radiables in the Police Station on Server 2

And maybe:

4.5 Roof Bases - Bases may be on a roof as long as they follow all other rules and have a legal ramp, bridge or ladder leading to their entrance.

but you did not show any proof of it.
I will add the player to talk to him and than decide my final verdict on the ban length whether one will be needed.