It's not really just a case of our supposition. Albeit 'not law' the associated Guidance document makes it clear that they are (at least, currently) talking about EICRs - and specifically/explicitly that it is the C1s and C2s (but not C3s) that must be "remedied within 28 days".Well, we only suppose an EICR is what is required because as far as we are concerned, that is all there can be.
It's not for me to say whether the legislation was 'necessary'. However, if it is 'deemed necessary' then there obviously would, at least in theory, be ways in which it could be made more 'effective' - after all, I don't think that many people would say that, because of reasons similar to what you are thinking of, we 'should not bother' with things like MOT tests (even driving tests) etc. etc.Quite. Just a lot of unnecessary work being done. .... Was the legislation really necessary at all? ... Unscrupulous landlords will continue to be unscrupulous.
With things 'as they are' I think you're essentially correct. However, if there were a way (and it can't be 'impossible') of having a system which resulted in a bit of paper confirming that (with a reasonable degree of correctness/confidence) an electrical installation was 'adequately safe', it could be said that that would serve a useful purpose, couldn't it?Electrically unknowledgeable landlords giving a piece of paper to electrically unknowledgeable tenants that could say anything such that, as with much legislation, it will not really improve anything but just lead to someone - not necessarily the correct someone - to blame when something horrible happens.
Kind Regards, John