With the partial shutdown of the US government having ended approximately 2019-01-25 21:30 -05, the NIST file appears to have been updated this morning; proposed patch attached.

On Tue, 8 Jan 2019 at 03:09, Martin Burnicki <martin.burnicki@meinberg.de> wrote:
Maybe one of you should make a concrete proposal to Christian Bizouard
and tell him which text should be added in which places to meet your
requirements.

That is on my to-do list for the coming days, and I'll keep Paul in the loop on that as well.  I'd much rather we start taking this file from https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list

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Tim Parenti