Thanks huey and hughes,
looking at the document 'Consolidated AMC & GM to Annex VIII (Part SPO) Page 177 (c) 3 it reads "All additional equipment used, e.g. ropes, cables, mechanical hooks, swivel hooks, nets, buckets, chainsaws, baskets, containers, should be manufactured according to applicable rules or recognised standards. The operator should be responsible for maintaining the serviceability of this equipment."
Where would I find the applicable rules or recognized Standards?