On 10 Apr 2006 18:29:51 -0700, "Mike Granby" wrote
in .com::

The essence of the reply is that
(i) it is necessary to be in contact with the specific TRACON
responsible for the Class C rather than just any old ATC facility;


http://ecfr.gpoaccess.gov/cgi/t/text....1.3.10.2.4.17
§ 91.130 Operations in Class C airspace

(c) Communications. Each person operating an aircraft in Class C
airspace must meet the following two-way radio communications
requirements:

(1) Arrival or through flight. Each person must establish two-way
radio communications with the ATC facility (including foreign ATC
in the case of foreign airspace designated in the United States)
providing air traffic services prior to entering that airspace and
thereafter maintain those communications while within that
airspace.

From the words of the regulation above it is clear that the words 'the
ACT facility' refer to the ATC facility with responsibility for flight
within their Class C airspace. But it could have been worded so that
there was less ambiguity.

and (ii) that the receipt of VFR advisories does not absolve a pilot of his
responsibility to contact that TRACON before entering the airspace and
that he would therefore be in violation if he entered without so doing.

It is difficult to anticipate a situation in which Radar Traffic
Advisory Service within a Class C airspace is being provided by a
facility other than the one which has responsibility for that Class C
airspace.

As I say, links to PDFs to follow.

Thanks for your effort in seeking official clarification of this
issue, sharing it here, and making the original documents available
on-line.