| International Softball
Federation Certification ( ISF
). ISF Certification is the highest honor
available for the working umpire. In order to
qualify, an umpire must have umpired in at least
three ( 3 ) ASA National Championships, two of
which must be in the major classification and
receive the highest rating available. In
addition, the acceptance is subject to the
approval of the ISF Selection Committee. It is
from this select group that all umpires are
selected to umpire at the international level. MASA
umpires that have honored their association with
their ISF Certification are as follows:
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