Thanks for your patience with me in responding to this. As it turns out, the answer was there all along in the "Eligibility" section of the project description:
1. To be eligible to win a prize under this competition, you: a) must be a citizen or permanent resident of the United States and 18 years of age or older before the submission period ends; b) may not be a Federal employee acting within the scope of your employment; c) may be a private entity, such as a corporation or other organization, that is incorporated in and maintains a primary place of business in the United States. Individuals submitting on behalf of corporations, nonprofits, or groups of individuals (such as an academic class or other team) must meet the eligibility requirements for individual contestants. An individual may join more than one team, corporation, or nonprofit organization; and d) may not be an employee of NEA or an immediate family member (spouse, parents or step-parents, siblings and step-siblings, children and step-children, and household members).
Thank you again for your interest in the challenge.