Chuck wrote:
You can use an expired database GPS
for all the VFR you want. But to use it for IFR, you first have to
confirm the database information for any approach you'll use hasn't
changed. Or you have to manually chage it in the database if it has
changed.

I don't have a reference on that, ... snip

The applicable document is the Supplemental POH. The Supplemental POH is
approved on an installation by installation basis, so there is technically no
general answer, except RTFM for your airplane.

In practice, the GPS manufacturer provides a boilerplate SPOH, so that's what
gets sent into OK City for approval.

Dave