Okay, here are some excerpts...
Ch 3 2006 UPC 301.1.1
All Pipe, pipe fittings, traps, fixtures, material and devices used in a plumbing system shall be listed or labeled, (3rd party certified), by a listing agency, (accredited conformity assessment body) and shall conform to approved applicable recognized standards referenced in this code, and shall be free from defects. All materials, fixtures, or devices used or entered into the construction of plumbing systems, or parts thereof, shall be submitted to the AHJ for approval.

Ch 10 2006 UPC, 1001. Each plumbing fixture excepting those having integral traps.

1001.2 One trap may serve not more than 3 single compartment sinks or laundry tubs of the same depth or 3 lavatories immediately adjacent to each other and in the same room if the waste outlets are not more than 30 inches apart and the trap is centrally located when the three compartments are installed.

Nolan, I don't think anyone here is trying to be too verbose but only conveying an understanding of code requirements. If it is questionable, you did the right thing to post it here to gather some understanding from the other inspectors. Hopefully this helps in your endeavors also.

Taker care and good luck.

Pat