In industries or industrial undertakings, a company or establishment agreement or, failing that, an extended collective labour agreement may stipulate that operational staff work in two groups, one of which, known as the relief team, has the sole function of replacing the other during the rest day(s) granted to the first group.
The weekly rest period for employees in the relief team is allocated on a day other than Sunday.
This derogation also applies to the staff required to supervise this team.