[james-w]

I also live in Austin and do not have wipers. We have got caught in the rain twice and both time I have had rain-x on both sides of the glass and have not had any problems with visibility. I have never had an inspector ask about why I don't have them. So to me they are a non-issue that I would not worry about. Another member of the Austin group had a pair of clip on wipers, as others have suggested.

James