Cian O'Callaghan (Dublin Bay North, Social Democrats) | Oireachtas source

This seems to assume that the only source of information could be the first party. Surely there are other potential sources of information. Often, the main source of information may indeed be the first party. I totally accept that. Surely in some circumstances there could be relevant information. Even if there are no third party rights, it could still be relevant information to the enforcement authority that is not from the first party. Why will they be legally excluded from being in any way relevant or applicable here?