(a) Neither the Mayor, Councilmembers, the City Manager, nor any City employee shall sell or barter anything to the City or to a contractor to be supplied to the City; or make any contract with the City; or purchase anything from the City other than those things which the City offers generally to the public (i.e. utility services), and then only on the same terms as are offered to the public. Violation of this section shall constitute cause for removal from office or employment. Any violation of this section with knowledge, expressed or implied, of the person or corporation contracting with the City shall render the contract voidable by the City Manager or the Council. This subsection shall not apply in cases in which the City acquires property by condemnation.
(b) The Council, by ordinance or the City Manager by personnel rules, may further regulate conflicts of interest and ethics of officers and employees of the City.
(c) Any member of the Council or any board, commission, or other authority who has a direct personal or private interest in any question before the body of which he is a member shall abstain from voting thereon. Violation of this section shall constitute cause for removal from office for members of any board, commission, or other authority of the City government. Provided, however, a violation of this section shall not affect the validity of any action taken by the City Council or any other board or commission of the City.