Title 5: Federal Authorities
Chapter 2: Federal Assembly
Section 2: Procedure
Art. 162 Immunity
1 The members of the Federal Assembly and the Federal Council as well as the Federal Chancellor may not be held liable for statements that they make in the Assembly or in its organs.
2 The law may provide for further forms of immunity and extend its scope to include other persons.
Immunity
State privileges and immunities
EDIT.