If e-voting is currently being used, is it taking place in controlled or uncontrolled environment?

ELECTIONS LAW – LAW N. 9,504 OF SEPTEMBER 30th, 1997 (with amendments till 2012) 

See also online report:

"Polls workers may occupy different positions at their assigned polling places: Chair of the Election Board, Clerk or Deputy Clerk, Assistant Clerk and Deputy Assistant Clerk, and alternate. On Election Day, poll workers are responsible for organizing their assigned polling place; identifying citizens who appear to vote, and authorizing them to cast their vote; operating electronic voting machines; processing electoral justification forms; and ensuring that voting is conducted fairly and orderly."

This document explains the role and the attribution of a poll worker during the voting  process. 

Data has been confirmed by TSE on 28 June 2017

According to Election law and TSE resolutions e-voting takes places in polling station under the supervisions of staff appointed by the Electoral Courts. Article 66 of Election law states that parties and coalitions may oversee all stages of the voting process, as well as the electronic processing of the aggregation of results.