The MoonROx Challenge is designed to promote the development of technologies and equipment to extract oxygen from lunar regolith. In-situ resource utilization (ISRU) technologies have the potential to significantly contribute to the success of future lunar missions planned by NASA under the U.S. Vision for Space Exploration. The MoonROx Challenge will be conducted by the California Space Education and Workforce Institute (CSEWI), in association with California Space Authority (CSA), in a “first to demonstrate” competition format. A $1,000,000.00 MoonROx prize will be awarded to the first team whose hardware can quickly extract breathable oxygen from a supply of lunar regolith simulant using a steady-state process, within the constraints established in this rules and requirements document. The MoonROx Challenge, and the opportunity to win the prize purse, expire on (date TBD).