Garrett Chip Legality?

["Khan M. Klatt" <kmk@pacificrim.net>]

I am looking for some good resources (i.e. "My sister's boyfriend's
brother's aunt works at an exhaust emissions place, and she said they're
OK" is *NOT* a good resource) regarding the legality of replacing your
stock chip with something like a Garrett chip.

I spoke to the mechanic who installed my shocks and springs, and he said
that installing a performance chip like the Garrett chip is illegal for
emissions, etc. reasons.

I want to go back to him and say "sorry, but installing the chip is legal
because of a, b, and c, and the garrett chip meets a, b, and c, as well as
the stock chip."

Information pertaining specifically to the state of Washington would be
much appreciated.

-Khan

--
Khan Klatt
1997 VW Jetta GLX, Emerald Green
 --> Biber Beige Leather
 --> All-weather Package
 --> Bilstein HD Shocks & Struts
 --> Neuspeed SofSport Springs
 --> Mintex Redbox Brake Pads
 --> K&N Air Filter
 --> Clarion CD Changer (Trunk-mounted)
 --> Velcro-mounted CD Storage in Trunk
 --> Locking Gas Door
 --> AirCondition Mod