The rules are:
You MUST use your own rocket
NO orbital construction OR refueling
You have to have a Lunar Orbit Rendezvous (LOR) mission design, (in the case of Kerbals, probably MOR)
You NEED a separate Munar Excursion Module (MEM) and a Command/Service Module (CSM), consisting of a Command module (CM) and a Service Module (SM)
No MechJeb, KOS is permitted for all phases of the flight
PLEASE note that visual mods (EVE, Scatterer, SVE, SciFi Visual Enhanc