After a decision has been taken on the admission to the relevant representative assembly of the members elected, the central electoral committee is empowered to surrender to the public prosecutor, in the interests of the investigation of any criminal offence, the packets referred to in section P 21, subsection 2, the official report referred to in section P 22, and, unless the election is to a municipal council or the council of a province which forms a single electoral district, the official reports from the principal electoral committees.