- openbook Competition Bulletin 2019-5: Age Change to Schoolboy Jr. ClassTimeMay 22, 2019Age Change to Schoolboy Jr. Class
- openbook Competition Bulletin 2019-4: Revised 2019 ATVMX Racer Order AvailableTimeApril 3, 2019Revised 2019 ATVMX Racer Order Available
- openbook Competition Bulletin 2019-3: 2019 Rules for Professional ATV Motocross Competition Now Posted TimeFebruary 22, 20192019 Rules for Professional ATV Motocross Competition Now Posted
- openbook Competition Bulletin 2019-2: Updated 2019 Production Class Clarification Chart PostedTimeFebruary 22, 2019Updated 2019 Production Class Clarification Chart Posted
- openbook Competition Bulletin 2019-1: FINAL 2019 ATVMX National Classes and Supplemental RulesTimeJanuary 4, 2019FINAL 2019 ATVMX National Classes and Supplemental Rules
- openbook Competition Bulletin 2018-9: Tentative 2019 ATVMX National Classes, Supplemental Rules and Production Stock Chart Available for Public CommentTimeDecember 20, 2018The Tentative 2019 ATVMX National Classes, Supplemental Rules and Production Stock Chart are now available for inspection…
- openbook Competition Bulletin 2018-8: Request for Rule Changes for 2019 and Riders Meetings Scheduled for BanquetTimeNovember 10, 2018Request for Rule Changes for 2019 and Riders Meetings Scheduled for Banquet.
- openbook Competition Bulletin 2018-7: 2018 ATVMX National Championship Class Top 10 Now AvailableTimeSeptember 4, 20182018 ATVMX National Championship Class Top 10 Now Available
- openbook Competition Bulletin 2018-6: Updated Championship Points DropsTimeJune 18, 2018With the cancelation of the Muddy Creek ATVMX, it is necessary to revise the Class Championship drops.
- openbook Competition Bulletin: 2018-5: Muddy Creek ATVMX National CanceledTimeMay 29, 2018Muddy Creek ATVMX National Canceled
- openbook Competition Bulletin 2018-4: Foreign Rider Eligibility RequirementTimeApril 10, 2018Foreign Rider Eligibility Requirement
- openbook Competition Bulletin 2018-3: Tentative 2018 ATVMX Practice and Race Orders Available to Public CommentTimeMarch 13, 2018Tentative 2018 ATVMX Practice and Race Orders Available to Public Comment