Marcin Lewoszewski and Jakub Krupiński published an article focused on registering telecommunications providers in Poland. The article is available on Lexology website – here: https://www.lexology.com/library/detail.aspx?g=581cabba-d3f4-472b-81e2-cc760a2413e8
The article describes in detail how to register a telco provider in Poland and should be useful for any of such providers that offer telecommunications services in Poland.
At the same time, anyone looking for a regulation of the Minister of Digitalization on the Transmission of Data On Telecommunications Activities, it is available here in Polish.
Regulation of the Minister of Digitalization On The Transmission of Data On Telecommunications Activities