http://www.dma.org.uk/content/dm-code-practice
The trouble with a code of practice of course is that it has no enforceability, it simply sets stands of behaviour.
If the people behind these PPI calls are good upstanding citizens with high moral standards then they will of course aspire to good behaviour and hence they will adopt the code of practice.
If on the other hand, they are despicable money-grabbing low-life, aiming to make a fast buck from a second rip off on those who were already ripped off by the banks, then one would have to question the likelihood that they would adhere to a code of practice.
I am sure there is more than one organisation behind the calls, and I do not mean to imply any personal judgement as to which of the above scenarios is most likely for any particular caller
