I-9, r. 6 - Code of ethics of engineers

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3.04.02. An engineer must affix his signature on the original and the copies of every written consultation and opinion, measurement, layout, report, computation, study, drawing and specification prepared by himself or prepared under his immediate control and supervision by persons who are not members of the Order.
An engineer may also affix his signature on the original and the copies of documents mentioned in this section which have been prepared and signed by another engineer.
O.C. 2566-84, s. 4.