This charter may be amended by proposals therefor submitted
by the council, or by the mayor upon initiative petition of the people
as provided by the state constitution, at a general or special election,
ratified by a majority of the qualified electors voting thereon, and
approved by the governor as provided by the state constitution. If
more than one amendment are proposed, all of them except those which
are so interrelated that they should be ratified or rejected together,
shall be submitted in such manner that the electors may vote on them
separately. A proposition to amend this charter may be either in the
form of a proposed amendment to a part or parts of the charter or
of a proposed new charter.