DFC
>>>The requirements for owner maintenance and in the club environment for maintenance by a club member simply require the person to be suitable to the authority. Noting about having some maintenance organisation approve them.<<<
I'll dig out the chapter and verse on this, but as I read it the CAMO will permit or otherwise any pilot or other maintenance.
You have to inform the CAMO within 30 days of any maintenance carried out and they may require to inspect the work. If they find it not to their taste, they have the authority to limit any pilot maintenance still further. They can also prevent an LAE from doing work on your aircraft if they have grounds for believing it to be below (their) standard.
Under agreements with CAMOs, which we are being 'encouraged' to take out, we have the responsibility for continued airworthiness, but are firmly in the hands of our CAMOs.