I'm about to register a home-made trailer, in Arizona.  Anyone know
where I can find a detailed list of requirements?  I've seen several
web-sites which have what I would call an overview for each state,
which isn't detailed enough for me.  I already know that I need safety
chains, tail/stop/turn lights, license plate light, and mud flaps.
However, I'm not sure if I need 1 or 2 safety chains, and I'm also not
sure what the rules are about how they need to be attached to the
trailer.  I'm also not sure if I need clearance lights, or just
reflectors (the yellow ones on the side, towards the front of the
trailer).

I called the DMV (Dept of Motor Vehicles (what they call it in AZ)).
The first woman I talked to, Sandra, told me that an equipment
inspection isn't even done for home-made trailers, she said it was just
a class 1 inspection which just means they attach a VIN.  I knew that
wasn't right, so I called back right after I hung-up.  This time I
talked to "Mike" who told me that 2 chains are required, and that they
had to be welded to the trailer, among other things.  Then I went to
the DMV and talked to one of the actual inspectors.  He said the chains
CANNOT be welded, and that they must be bolted instead.  That inspector
told me that I didn't need clearance lights, just reflectors.  However,
I also talked to another inspector the same day who told me that I
needed lights, not reflectors.

Anyway, everytime I talked to a different person at the DMV, I get a
different answer.  Since I'm not sure which inspector I'll get when I
actually bring in my trailer, or what story he may have that day, I
would rather find some written information I can fallow (i.e.-The
actual LAW).  I tried to memic my design as close as possible to other
trailers I've seen, but I didn't want to copy them exactly (I would
have just bought one if I wanted that, since it cost just as much to
make one myself).

p.s.-I'm building a 4'x8' utility trailer.  Flat bed.  All steal.
Expanded Metal bed.  V-shaped tounge, with center jack.  Straight, not
a goose neck.  All equipment is class 3, including chains and hitch,
even though I'll never load more than 800 pounds.  Single axle.  Round
fenders.  15" wheels/rims, tires are about the size of a basic F-150.