You can buy this dictionary, or will soon be able to, in the paper version or as an Acolada digital version (already available) – I see it’s possible to rent it online for an annual fee. The Acolada version can be combined with other reference works, including Kettler’s dictionary of Intellectual Property and Creifelds.
https://acolada.de/woerterbuecher/woerterbuch-fuer-recht-wirtschaft-und-politik/
Lexikon/Wörterbuch
Buch. Hardcover (In Leinen)
6. Auflage. 2020
Rund 1102 S
C.H.BECK. ISBN 978-3-406-60914-5
(In Gemeinschaft mit Matthew Bender/New York und Helbing & Lichtenhahn/Basel)
Format (B x L): 16,0 x 24,0 cm
This is the 6th edition. The 5th is out of print.
If you are using a paper dictionary, I remember this and Romain both being quite time-consuming to use. The digital version will at least find your word promptly.
I have a problem with dictionaries nowadays. The updates are not always very comprehensive, or at least they don’t contain new information that is very useful for me. For example, the latest DE>EN Romain contained a large number of updates to include feminine terms. Maybe it used to say Rechtsanwalt and now it says Rechtsanwalt/Rechtsanwältin. I am afraid this had little effect on my use of the dictionary. My copy eventually fell apart and I then bought a second-hand copy of the earlier edition (3rd ed., 1994). This does the job for me. I think there may be a successor to Romain in the pipeline but have no information on this.