Clean ballast
Clean ballast means ballast which:
(1) If discharged from a vessel that is stationary into clean, calm water on a clear day, would not—
(i) Produce visible traces of oil on the surface of the water or on adjoining shore lines; or
(ii) Cause a sludge or emulsion to be deposited beneath the surface of the water or upon adjoining shore lines; or
(2) If verified by an approved oil discharge monitoring and control system, has an oil content that does not exceed 15 p.m.