The paper examines the Italian reform which has modified the Article 4 of the law n. 300/1970 (so-called Statute of workers) regarding remote monitoring devices used on workers and moves on to assess the impact of this reform on the ban of opinion polls, as sanctioned by Art. 8 of the law n. 300/1970 (so-called "Knowledge checks”). In the presentation of the latest regulation, the paper also contains an analysis of the relationship between the new rules about employers’ power of control and the legislation concerning data protection. In this light we give details about the European and International framework, especially considering the General Data Protection Regulation (EU) 2016/679