Heliduck
Just the same here in UK. we have lifting regs over here which covers anything that is involved in lifting. The regs are very specific in some areas such as lifting slings and chains shackles that they must be certified and inspected. However quite often there is no inspection regime for slings e.g. there should be no damage, nicks signs of wear, that is pretty loose in some respects!
Bitmox in your case you will find The Barry Longline has a certification ( normally 7 times working limit ) with an inspection regime as does the 5 year overhaul for an on board systems hook. I would suggest that Swiss law will have like UK its own lifting regs. Would suggest as we do we run spreadsheets showing when things were, purchased, inspected, how often used,binned etc etc. That way it proves you are running a safety management system for your equipment. In that way if some thing goes wrong or fails then you have had taken all reasonable precautions