Cumulatively won’t this adjustment eventually mean that high noon falls at 8am one day and 3pm another?
What I read of the article was poorly written. They are just arguing for a negative leap second adjustment. If accepted, it would likely happen in July, and the last minute of the month would be one second short.
There is really nothing earth-shaking about this. We regularly make adjustments like this, though in the past I believe they have all been additional seconds, rather than subtractive ones. If such a decision is made for this adjustment, it will be announced and published by IERS.
The following is from a file published by IERS and NIST.
# 4. The decision to insert a leap second into UTC is currently
# the responsibility of the International Earth Rotation and
# Reference Systems Service. (The name was changed from the
# International Earth Rotation Service, but the acronym IERS
# is still used.)
#
# Leap seconds are announced by the IERS in its Bulletin C.
#
# See www.iers.org for more details.
#
# Every national laboratory and timing center uses the
# data from the BIPM and the IERS to construct UTC(lab),
# their local realization of UTC.
#
# Although the definition also includes the possibility
# of dropping seconds ("negative" leap seconds), this has
# never been done and is unlikely to be necessary in the
# foreseeable future.