assessment of benefits against property, except as to powers similar to
those of the board of public works of such cities, are hereby further
limited as follows: The aggregate amount of benefits which may be
assessed against property by such park board in cities of the first
class during said ten year period, from and after the taking effect of
this act, shall not exceed one million, two hundred and fifty thousand
dollars. The total amount of such local benefits which may be assessed
by such board of park commissioners in cities of the first class during
any one year after the taking effect of this act, shall not exceed
two hundred thousand dollars. The aggregate amount of benefits which
may be assessed against property by such board of park commissioners
in cities of the second class during said ten year period, from and
after the taking effect of this act, shall not exceed five hundred
thousand dollars. The total amount of such local benefits which may
be assessed by any such board of park commissioners in cities of the
second class during any one year after the taking effect of this act
shall not exceed fifty thousand dollars: _Provided_, That if in any
one year such board of park commissioners in any city of the first or
second class should assess an amount less than the annual limitation
herein contained, then and in that event any such board may, in the
following or any subsequent year, make such assessments in excess of
said annual limitation to the amount of such difference between such
annual limitation and the amount assessed in any previous year. The
limits herein fixed shall not be deemed to apply to any sum which may
be raised from a general tax levy, and appropriated by the council of
such city for the use of such park board, or received from any source
other than through benefit assessments, but the limiting amounts herein
named shall apply only to such benefit assessments, not including those
ordered by powers similar to those of the board of public works.