Sec. 43.01  Applicability.

    (a) The sections in this part include requirements which have been 
promulgated under authority of sections 211 and 219 of the 
Communications Act of 1934, as amended, with respect to the filing by 
communication common carriers and certain of their affiliates of 
periodic reports and certain other data, but do not include certain 
requirements relating to the filing of information with respect to 
specific services, accounting systems and other matters incorporated in 
other parts of this chapter.
    (b) Except as provided in paragraph (c) of this section, carriers 
becoming subject to the provisions of the several sections of this part 
for the first time, shall, within thirty (30) days of becoming subject, 
file the required data as set forth in the various sections of this 
part.
    (c) Carriers becoming subject to the provisions of Secs. 43.21 and 
43.43 for the first time, because their annual operating revenues equal 
or exceed the indexed revenue threshold for a given year, shall begin 
collecting data pursuant to such provisions in the calendar year 
following the publication of that indexed revenue threshold in the 
Federal Register. With respect to such initial filing of reports by any 
carrier, pursuant to the provisions of Sec. 43.21 (d), (e), (f), (g), 
(h), (i), (j), and (k), the carrier is to begin filing data for the 
calendar year following the publication of that indexed revenue 
threshold in the Federal Register by April 1 of the second calendar year 
following publication of that indexed revenue threshold in the Federal 
Register.

[ 28 FR 13214 , Dec. 5, 1963, as amended at  62 FR 39778 , July 24, 1997]