private voluntary organization
The term “private voluntary organization” means a not-for-profit, nongovernmental organization (in the case of a United States organization, an organization that is exempt from Federal income taxes under section 501(c)(3) of title 26 ) that receives funds from private sources, voluntary contributions of money, staff time, or in-kind support from the public, and that is engaged in or is planning to engage in voluntary, charitable, or development assistance activities (other than religious activities).