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

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3.03.04. An engineer may not cease to act for the account of a client unless he has just and reasonable grounds for so doing. The following shall, in particular, constitute just and reasonable grounds:
(a)  the fact that the engineer is placed in a situation of conflict of interest or in a circumstance whereby his professional independence could be called in question;
(b)  inducement by the client to illegal, unfair or fraudulent acts;
(c)  the fact that the client ignores the engineer’s advice.
R.R.Q., 1981, c. I-9, r. 3, s. 3.03.04.