The new law allows the Swedish National Defence Radio Establishment, or FRA, to track communications in Sweden, including reading email and tapping phones. It was passed in 2008 and came into force this January. Now the government's amendments will be voted on today.
Changes include a specific court of law to track the FRA's intelligence work and a new authority that will handle appeals from people who want to complain.
While the majority of the centre-right government MPs are for the law, the opposition Social Democrats say they will scrap it if they get elected next year.