Now Illegal to loop breakaway cable round tow hook.
New designs of towbar are now approved to UNECE Regulation 55, instead of usually confirming to Directive 94/20EC (Reg 55 was always an accepted alternative). The relevance of this to breakaway cables is that Reg 55 requires the towbar to have a designated breakaway cable attachment point, which 94/20 never included.
Best description I can find is here:
and an English site:
with thanks to SM25 for the unhappy German's sorry Swiss tale, 460 franc fine for looping round tow hook. No, this is NOT merely a Swiss law, but as usual the Swiss are nailing foreigners for money seeing it as a profit opportunity.
The solution I will apply is £3 quid from Amazon