You can download the registration form / waiver packet prior to the event and bring it to any of the listed town rec departments or to a 2nd Nature store.  If you’re under 18 your parents have to fill out the waiver so make sure you have them fill it out before the day of the contest unless they will be bringing you to the contest.  You must obey the rules of each skate park.  Most town parks require at least a helmet so make sure to bring safety gear or you may not be able to skate.  The registration form / waiver packet also has the rules for each town park and more info on the contests.