CFR > Title 33 - Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER S—BOATING SAFETY (parts 173 to 188) > PART 183—BOATS AND ASSOCIATED EQUIPMENT > SUBPART I—Electrical Systems (§183.401 to §183.460) > 183.401—Purpose, applicability, and effective dates.