The government is working on a bill to create simplified procedures for nuclear power plants, that is planned to be ready by 2027. This technology seeks to complement renewable sources.https://www.notebookcheck.net/After-decades-of-prohibition-Italy-plans-to-go-back-to-nuclear-energy-by-2027.956446.0.html
"simplified procedures for nuclear power plants that should be ready by 2027"
Grammar suggests that nuclear power plants be ready in 2027. Impossible!
If the intended meaning is simplified procedures be ready in 2027, the phrase must be:
"simplified procedures, which should be ready by 2027, for nuclear power plants"