[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: 36CFR21.4] [Page 262] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR PART 21_HOT SPRINGS NATIONAL PARK; BATHHOUSE REGULATIONS--Table of Contents Sec. 21.4 Registration of physicians. Physicians desiring to prescribe the thermal waters of Hot Springs National Park must first be registered at the office of the Superintendent. Any physician may make application for registration to the Superintendent. To maintain registered status, reapplication is required triannually.