[Code of Federal Regulations] [Title 7, Volume 6] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 7CFR503.4] [Page 331] TITLE 7--AGRICULTURE CHAPTER V--AGRICULTURAL RESEARCH SERVICE, DEPARTMENT OF AGRICULTURE PART 503--CONDUCT ON PLUM ISLAND ANIMAL DISEASE CENTER--Table of Contents Sec. 503.4 Conformity with Plum Island regulations. Persons in and on PIADC shall at all times comply with official signs of a prohibitory or directory nature and with the directions of law enforcement or other authorized officials.