In order to handle and possess rocketmotors,igniters and ejectioncharges in the Netherlands one must have a special permit called a WECG.  If you do not have a WECG you can still build and launch a rocket at a club but you must ask someone who has a WECG to bring and prepare the rocketmotor for you. You are NOT allowed to prepare and install rocketmotors on the launchsite yourself.