Each citation, or a copy, must be prominently posted, as the Secretary's regulations prescribe, at or near each spot where a cited violation occurred (29 CFR 1903.16: posted immediately on receipt and kept up for three working days or until the violation is abated, whichever is longer, with the notice of contest and any settlement posted likewise). Citations describe the violation with particularity, cite the provision breached and set a reasonable abatement time; none may issue more than six months after the violation.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.