PCV Valve Location on 1999 Altima

I wanted to replace the PCV valve on my 1999 Altima as part of a 100K
mile tune-up. The problem is I cannot find where it is located! I
have the 1998 Chilton's manual and it is not where the manual says it
was in 1998. Chilton's never did publish a later manual for Altimas.

I have been all over and under my car looking for it. Help would be
appreciated. I am guessing it accessed somewhere from underneath the
vehicle.