There's one born every minute.
Just in case you are serious Bamber I shall paste the sentence again:
no self-employed person shall carry out any such work, unless the employer or self-employed person, as the case may be, is a member of a class of persons approved for the time being by the Health and Safety Executive for the purposes of this paragraph.
I have even placed in bold the bits that are relevant to you.
For DIY in your own home fine; however, as has been discussed adnorsium since I first started taking part in online forums many years ago, if you are doing gas work for ANYONE OTHER THAN YOURSELF then you MUST be REGISTERED with CORGI.
Legally this would include payment of any kind; or working for or on behalf of anybody. If you were to sub-contract then both yourself and the contractor are legally repsonsible for making sure you are registered in some form or another.
Unfortunate and annoying this is I agree but that is the law.
You can argue the need for CORGI as an entity, but one thing is for sure, you do not appear to have enough grasp of the legislation you have to work under to be able to question it.
Amusing debate though so I thank you.