Modifications. A participant may increase or decrease the rate of
deferral or contribution of his or her compensation, and may make
separate elections with respect to the increase or decrease of the
rate of his or her before-tax deferrals and Roth contributions (to
the extent applicable), within the limitations set forth in § 50-3.2,
as of any enrollment date by duly filing a new or modified Participation
Agreement, or such other form authorized for such purpose by the Committee,
with the administrative service agency, which shall be effective as
soon as administratively practicable, subject to the timing requirements
set forth in § 50-2.1A and B.