"John R Weiss" wrote in message
news:rcbUb.91085$U%5.470879@attbi_s03...

. . .which isn't regulatory in nature (i.e., not a part of the FARs).


This is:

Title 14--Aeronautics and Space

CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION

PART 1--DEFINITIONS AND ABBREVIATIONS

§ 1.1 General definitions.

IFR conditions means weather conditions below the minimum for flight under
visual flight rules.