[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR91.173]

[Page 526]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
PART 91_GENERAL OPERATING AND FLIGHT RULES--Table of Contents
 
                         Subpart B_Flight Rules
 
Sec.  91.173  ATC clearance and flight plan required.

    No person may operate an aircraft in controlled airspace under IFR 
unless that person has--
    (a) Filed an IFR flight plan; and
    (b) Received an appropriate ATC clearance.