The use of public office for private gain is prohibited. The City Council shall implement this prohibition by ordinance. Regulations to this end shall include but not be limited to: acting in an official capacity on matters in which the official has a private financial interest clearly separate from that of the general public; the acceptance of gifts and other things of value; acting in a private capacity on matters dealt with as a public official, including the use of confidential information; and appearances by City officials before other City agencies on behalf of private interests. The appearance of impropriety shall be avoided. Municipal officials shall be, at a minimum, restricted from conflict of interest to the same extent that state public officials are bound by state law; provided however, that the City Council may adopt an ordinance setting a stricter standard.