This file depicts the flag of a German Körperschaft des öffentlichen Rechts (corporation governed by public law). According to § 5 Abs. 1 of the German Copyright law, official works like flags are gemeinfrei (in the public domain).
Note: The usage of flags is governed by legal restrictions, independent of the copyright status of the depiction shown here.

This image is in the public domain according to Article 4, case 2 of the Polish Copyright Law Act of February 4, 1994 (Dz. U. z 2022 r. poz. 2509 with later changes) "normative acts and drafts thereof as well as official documents, materials, signs and symbols are not subject to copyrights". Hence it is assumed that this image has been released into public domain. However in some instances the use of this image in Poland might be regulated by other laws.

According to the Czech Copyright Act, this work is in the public domain.

(Law No. 121/2000, Article 3, Section a)

“Protection pursuant to this Act shall not apply to

• an official work, such as a legal regulation, decision, public charter, publicly accessible register and the collection of its records, and also
• an official draft of an official work and other preparatory official documentation including the official translation of such work,
• Chamber of Deputies and Senate publications,
• a memorial chronicle of a municipality (muncipal chronicle),
• a state symbol and symbol of a regional self-governing unit,
• and other such works where there is public interest in their exclusion from copyright protection.”

Hence it is assumed that this work has been released into the public domain. However, in some instances the use of this work might be regulated by other laws.