Any Manx type buggy can participate. It does not have to be an original Manx. To participate the buggy has to be street legal and you must be a member. I'm not sure if you can join at the run or not. ($40) They have a pretty good website. (Manx club) I believe the designer of the orginal Manx Buggy, Bruce Meyers, will be there with his new version that is very much like the original version.