Provisional Events « U.S. Model Rocket Sporting Code US Model Rocket Sporting Code Rules Revision Process Form About the Sporting Code List of Changes NAR Contest Board Directory Model Rocket Safety Code Introduction Competition Altitude Events Payload Events Duration Events Craftsmanship Events Miscellaneous Events Provisional Events Appendix Super-Roc XL Altitude Pee-Wee Payload Payload Duration rules Super-Roc XL Duration rules