The city council by ordinance may continue, alter, establish
and provide for pensions for any class of employees of the City, by
continuation or amendment of the present pension plan of the City
or otherwise, and may provide for the manner, method and funds under
and with which any pension plan may operate; once established by the
Council by ordinance, the city manager, acting with the written consent
of the respective board, may alter or amend, but not end or terminate,
such pensions or other retirement plans. Any such pension plan may
require contributions from employees, may provide for benefits arising
out of employment prior to the adoption or amendment thereof, may
be made of a permanent character as to any class of employees, and
may be in conjunction with any pension or security arrangement of
the United States of America, the State of Colorado or any agency
of either of them.
