; and (iv) a nongovernmental organization; and (B) includes the Mote Marine Laboratory. (3) Nonprofit organization The term nonprofit organization means an organization— (A) described in section 501(c)(3) of the Internal Revenue Code of 1968; and (B) exempt from taxation under section 501(a) of such Code. (4) Secretary The term Secretary means the Secretary of Commerce, acting through the Administrator of the National Oceanic and Atmospheric Administration. (5) South Florida The term South Florida means— (A) all land and water within the administrative boundaries of the South Florida Water Management District; (B) regional coastal waters, including Biscayne Bay, the Caloosahatchee Estuary, Florida Bay, Indian River Lagoon, and St. Lucie River Estuary; and (C) the Florida Reef Tract.