Art. 16 APA from 2022

Art. 16 3. Right to refuse to testify
1 The right to refuse to testify is governed by Article 42 paragraphs 1 and 3 of the Federal Act of 4 December 1947 (1) on Federal Civil Procedure (FCP).
2 A person who has knowledge of a professional or trade secret in terms of Article 42 paragraph 2 FCP may the refuse to testify unless he is required to testify by another federal act.
3 ... (3)
(1) SR 273(2) Inserted by Annex No 10 of the Federal Administrative Court Act of 17 June 2005, in force since 1 Jan. 2007 (AS 2006 2197 1069; BBl 2001 4202).
(3) Repealed by No I 1 of the FA of 23 June 2000 on the Amendment of Federal Legislation in order to guarantee the Protection of Journalistic Sources, with effect from 1 Feb. 2001 (AS 2001 118; BBl 1999 7966).
Es besteht kein Anspruch auf Aktualität und Vollständigkeit/Richtigkeit.