Tacho service/judgment prohibited from 01-10-2018 in the Czech Republic?

Hello, I was in the Czech Republic this weekend, and wanted to have a tacho service. To my surprise, the expert who has done such work so far was no longer there. I interviewed the neighborhood, which had also spoken good English, and there I was told that tacho adjustment has been banned in the whole Czech Republic since 01.10.2018, and the expert moved out on 02.10.2018. Is that true, that in CZ now also speed adjustment since the 01.10.2018 is prohibited?