Approved or not:
There is still haziness about safe and right connecting chairs. Some events have been cancelled because of wrongly linked chairs.
Are your chairs being linked according the EN 14703 regulation? Then your hall or event cannot be disapproved.
Please realise that:
At least 95% of the “old” existing linking systems fail the En 14703 test.
The Chairing link has, besides the safety aspect, many advantages. Please take a look at “Features and labour-friendly”.