NOTICE OF START OF WORK (AOC)
Work to be done by contractors on the CERN site
must be announced by means of a Notice of Start of Work called
AOC (Avis d'Ouverture de Chantier, pdf)
issued by the work supervisor (member of the CERN personnel supervising
the work or outside supervisor mandated by the Organization).
The AOC forms is an important part of the risk prevention
plan. The AOC is sent to all CERN services and all persons concerned,
both to obtain their comments and to inform them and draw their
attention to the risks and any constraints associated with the
worksite (see Safety Instruction 39).
If in case of doubt about the need for an AOC, supervisors
must consult SC-GS-SI.