C-48.1, r. 6 - Code of ethics of chartered professional accountants

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57. A member shall make sure that his client is informed of the approximate and foreseeable cost of his services unless he can reasonably assume that the client is already informed. A member shall inform his client without undue delay if he expects to exceed the approximate cost.
O.C. 58-2003, s. 57; O.C. 779-2004, s. 22.