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CFR > Title 33 - Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER O—POLLUTION (parts 151 to 159) > PART 159—MARINE SANITATION DEVICES > SUBPART C—Design, Construction, and Testing (§159.51 to §159.131) > 159.83—Level indicator.
159.83—Level indicator.
Each sewage retention device must have a means of indicating when the device is more than 3/4 full by volume.