This does not look promising, alas.

April 26 2017:

http://www.rohsguide.com/rohs-categories.htm

*The following products are currently exempted from RoHS compliance:*

 National security use and military equipment
 Outer space equipment
 Non-road mobile machinery
 Large stationary industrial tools and installations
 R&D equipment
 Implantable medical devices
 Photovoltaic panels
 Certain light bulbs and some batteries
 Spare parts for electronic equipment in the market before July 1, 2006.

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Related information is probably contained in linked papers here BUT I
suspect the chance of finding them is (very) small.

        http://rohs.exemptions.oeko.info/index.php?id=3D127

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