This is the 14559th most frequent German word.
letztmaligen
"Final" or "most recent."
Here, 'letztmaligen' describes 'Maßnahmen' indicating they were taken during the last instance.
Die letztmaligen Maßnahmen wurden im Jahr 2020 ergriffen.
The last occurrence measures were taken in the year 2020.
In this sentence, 'letztmaligen' is used to qualify 'Worte' signifying the final words spoken by a person.
Seine letztmaligen Worte hinterließen einen bleibenden Eindruck.
His last-time words left a lasting impression.
In this context, 'letztmaligen' modifies 'Bekanntmachung' to describe a final or last-time announcement.