Lightwater wrote:

You couldn't & were not allowed to have the rear windows opening. Others wanted to have the rear windows open just a bit. Hopefully you can get around this administrative issue.

I think this was a country by country requirement as you will see this in the photos on a Discovery 2 where the rear door window is a custom on one side and a standard on other side. the extra width quarter light and both quarter rear panel windows were blacked out.
Also in UK the seat belt mounting holes had stud bolts inserted and welded over !!! stopping commercial vehicles being covert to regular rear 60/40 bench seats.
In Norway the seats of a Freelander 1 where supplied, wrapped in a plastic bag, and it was up to the dealer/owner if they should be installed, but if installed the road tax was higher......... again country by country.

Click image to enlarge

Here the fixed quarter light [blackened] was moved and the opening window limited in width.

Click image to enlarge

Same car different side. Look through the windows .....

I did want to show these photos whilst the topic was current ........ but could not find the photos

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3landertwo wrote:

Here we have a Special LR built FL2 Commercial, for Western Power Telecoms.

Note the rear door window, gives sufficient viewing between B pillar and internal bulkhead then anything behind the bulkhead is blanked off. This is why lightwater is saying the rear door windows should be inoperative.