Hi,

I don't believe it is, just as it is not correct to use approach charts
before their start date. There was an article in IFR or IFR Refresher a
while back about this. Note that the charts contain both start and end
dates/times. I'm assuming you're referring to using it to fly instrument
approaches.

Hilton


"Scott Moore" wrote in message
news:RiSFb.180798$_M.829194@attbi_s54...
Why not ask Jeppesen ?

"PaulaJay1" wrote in message
...
I have the Jeppesen chip updating via the web for my 430. I just
updated and
installed the new data which is Dec 25 to Jan 22. Then I got to
wondering if
that chip is legal to use before the start date. Anybody know?

Chuck