66. A member who advertises professional fees must do so in a manner easily understandable by the public and, in particular:
(1) maintain the amount of the fees in force for the period mentioned in the advertisement; that period must not be less than 90 days after the last authorized broadcast or publication;
(2) specify the services included in those fees.
However, a member may agree with a client on an amount lower than the one broadcast or published.