The City shall have all the powers possible under the constitution and laws of the State of Iowa.
   1.   Construction.  The powers of the City under this Charter shall be construed liberally in favor of the City and the specific mention of particular powers in the Charter shall not be construed as limiting in any way the general power in this section.
   2.   Existing Legislation.  The enactment of this Charter shall not repeal existing resolutions or ordinances of the City or change its Code of Ordinances, except where the provisions of this enactment specifically change or are irreconcilable with the provisions of such resolutions, ordinances or provisions of this Code of Ordinances.
   3.   Savings Clause.  If any provisions of this Charter or the application of this Charter to any person or circumstance is held invalid, the invalidity shall not affect other provisions or applications of this Charter.