Anyone can join the site mepd.net to view sections like build threads and detailed info on specific sandtroopers. To join MEPD as an enlisted officer you need a pack and weapon for approval. The next level would be SWAT which is where you would choose a specific sandtrooper to emulate eg. "Move Along" trooper, "Stop that Ship" trooper etc. At that level they're then looking for specific details that only apply to that sandtrooper, some of whom do not require a pack.