[Code of Federal Regulations]
[Title 36, Volume 1]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 36CFR3.13]

[Page 37]
 
              TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY
 
      CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR
 
PART 3_BOATING AND WATER USE ACTIVITIES--Table of Contents
 
Sec.  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.