just an FYI:
ADR 42/04
19.3.2.6 Notwithstanding clauses 19.3.2.1 and 19.3.2.4, a power operated window system may close if it is capable of the following requirements:
19.3.2.6.1. while closing, the window reverses direction before exerting a pinch force of 100N or more within the range of 200 mm to 4 mm beneath the top edge of the power window frame.
19.3.2.6.2. upon such reversal, the window must open to one of the following positions:
A position that permits a cylindrical rod 200 mm in diameter to be placed through the opening at the top edge of the window.
A position that is at least as open as the position at the time closing was initiated.
A position at least 50 mm more open than the position at the time reversing was initiated.
Vehicle Standard (Australian Design Rule 42/04 - General Safety Requirements) 2005
there are a fair few rules for auto closing windows. shouldnt stop you getting a road worthy cert as 99.9999999% of RWC guys dont test the closing of windows, but technically not legal unless the standards are all met. which an aftermarket add-on probably wouldnt.