There is indeed a body that regulates taxi and limo services in New York City.
This is the New York City Taxi and Limousine Commission:
However, their price regulation only covers a fixed fare for taxis
from JFK to Manhattan, of $45 (plus any tolls). No fixed price exists
for trips TO JFK from Manhattan. Private car service does not fall
under the same pricing control, as indicated on this following frame
from the Port Authority New York and New Jersey website:
(see the flat rate mentioned for taxis, and the "prices vary" label
under the private car services)
(The PANYNJ regulates services at and involving the airports in the NYC area)
The majority of the private car operators only offer hourly rates,
with waiting time being 'on the clock'. Dial Car is one of the few to
publish a fixed rate for travel TO JFK from Manhattan; when you call
to pre-arrange pickup, the operator can confirm for you the total rate
applicable depending on whether you want the Meet and Greet service as
well. Another company that offers set prices is Carmel Limo:
Note that their prices for JFK to Manhattan are listed for full-size
sedan private car service, not luxury sedan (ie. Lincoln Town Car)
service. Meet and Greet service is additional with Carmel, as well.
Dial Car has a better record with the NY Better Business Bureau than
Carmel, but this may be a result of Carmel having a more diversified
service offering (ie. in addition to private car services, they also
do proms, events, etc):
In any case, complaints about either taxi service or 'for hire'
private car service can be filed with the New York City Taxi &
Limousine Commission through their website at:
However, this is targeted more at operators of the yellow taxis that
you can hail on the street, rather than the pre-arranged private car
services that you initially inquired about.
You will note in the Answer I just provided to your other question
regarding NYC tours, that one of the NYC tour companies (Romancing
Manhattan Tour) I mentioned can also include airport transfers in
their custom package for you, this is an option worth considering to
reduce the number of vendors you need to work with.
Google Answers Researcher