For purposes of this part, the term “marine and hydrokinetic renewable energy” means electrical energy from—
(1)
waves, tides, and currents in oceans, estuaries, and tidal areas;
(2)
free flowing water in rivers, lakes, and streams;
(3)
free flowing water in man-made channels; and
(4)
differentials in ocean temperature (ocean thermal energy conversion).
The term “marine and hydrokinetic renewable energy” does not include energy from any source that uses a dam, diversionary structure, or impoundment for electric power purposes.