Government representatives are responsible for sending to the Information Collection Centre (CRI) data from all the stages of 27 September: opening of polling stations, reporting the details of polling station committee members, the first and second turnout summaries and the count.
If you want to be a government representative you should contact the local council for the place where you are on the population register and ask to register. Each local council handles its own process for selecting government representatives except for Barcelona and Badalona.