Just to expand on Colin's post:
The Enforcement Concordat does say that if a person is willing to rectify faults without the need for formal enforcement, then that course of action should be taken.
The Enforcement Management Model used is the CFOA's version of the HSE's EMM. Each article that is not complied with gives a number of points, these points add up to give a distinct course of action. (With some other factors taken into account such as previous history etc) The more points, the more severe/formal the action.
As there is no Enforcement Notice given there is no appeal as it is more in the realms of our advice, but on that subject, I personally believe that it is wrong for the notice to say that not doing the work could lead to prosecution. If there is such a risk there that a prosecution would be possible by virtue of the failings putting relevant persons at risk, then it is our duty as enforcers of the RRFSO to follow that through at the time. What a NoD should say, in my opinion, is that if you don't follow the advice given then an Enforcement Notice WILL be issued to rectify the failings, and a failure to comply with such a notice IS an offence.