There may be certain circumstances in which people are specifically trained for this function; there may be others where the work they undertake would include training in this function; and there may be others who operate under the guidance of other individuals who have been trained as to how it should be effectively done. It will depend on the circumstances.
No authority acting under this provision will wish to make a mistake. They will want to do it properly because it is in their interests that the CPN should be enforceable.