---
kind: "section"
citation: "36 C.F.R. § 3.13"
title: "36"
number: "3.13"
heading: "What conditions apply to the use of Marine Sanitation Devices (MSD)?"
url: "https://uscodex.org/cfr/36/3.13"
---

# §3.13. What conditions apply to the use of Marine Sanitation Devices (MSD)?

- (a) **Discharging sewage from any vessel, whether treated or not, in any body of fresh water is prohibited.**
- (b) The owner or operator of any vessel on park fresh water that is equipped with toilet facilities and/or a MSD that is capable of discharge, must lock or otherwise secure the valves or mechanism of the device. Acceptable methods of securing the device include:
  - (1) Closing the seacock and removing the handle;
  - (2) Padlocking the seacock in the closed position;
  - (3) Using a non-releasable wire-tie to hold the seacock in the closed position; or
  - (4) **Locking the door to the space enclosing the toilets with a padlock or door handle key lock.**
- (c) The superintendent may modify the requirements of this section through a special regulation.

## Notes

### Authority

Authority: 54 U.S.C. 100101, 100751, 320102.

### Source

Source: 72 FR 13702, Mar. 23, 2007, unless otherwise noted.