USICS Information on the O-1 Visa, Individuals with Extraordinary Ability or Achievement:

https://www.uscis.gov/working-in-the-united-states/temporary-workers/o-1-visa-individuals-with-extraordinary-ability-or-achievement

USICS Policy Manual Regarding Nonimmigrants of Extraordinary Ability or Achievement (O):

https://www.uscis.gov/policy-manual/volume-2-part-m