The requirement has existed in Germany for over 2 decades.
Create station description with all requirements.
Send a table with the data to the RegTP. Station descriptions with all calculation bases and antenna radiation diagrams must be available, but will only be sent to RegTP upon request.
I´ve done the "Selbsterklärung" 20 years ago, using the programm "Watt32" which includes all forms. no problems.
Forms are available here:
73 de Robert