I am attempting now to establish a procedures for working at heights and fall protection in my company safety manual, it is a drilling company which has many rigs onshore and offshore ones, we are located outside the uk and there is no a specific regulations here but we can refer to any multinational standards, HSG, OSHA, etc.
As well I need to focus in the Man Riding task which is a daily activity in any rig.

Can anyone help me with any guides, references, tips or advice?

Try the Step Change in safety website.

If the informmation you require is not readily available, ask the question on their forums.

David