Who is responsible for checking the legality of initiatives?

FEDERAL CONSTITUTION OF THE SWISSCONFEDERATION

(Adopted1999; last amended 2013)

http://www.admin.ch/ch/e/rs/c101.html

Title 4: The People and the Cantons

Chapter 2: Initiative and Referendum

Art. 139 Popular initiative requestinga partial revision of the Federal Constitution in specific terms

(1) Any 100,000 persons eligible to vote maywithin 18 months of the official publication of their initiative request apartial revision of the Federal Constitution.

(2) A popular initiative for the partialrevision of the Federal Constitution may take the form of a general proposal orof a specific draft of the provisions proposed.

(3) If the initiative fails to comply with therequirements of consistency of form, and of subject matter, or if it infringesmandatory provisions of international law, the Federal Assembly shall declare it to beinvalid in whole or in part.

FEDERAL ACT ONPOLITICAL RIGHTS

(Adopted 1976; last amended 2009)

http://www.admin.ch/ch/e/rs/161_1/index.html

Title 5. The Popular Initiative

Art. 75 Examination of validity

(1) If the text of a popular initiativefails to comply with the principles of cohesion of subject matter (Art. 139para. 3 and Art. 194 para. 2 Federal Constitution) or consistency of form (Art.139 para. 3 and Art. 194 para. 3 Federal Constitution), or if the popularinitiative violates mandatory provisions of international law (Art. 139 para.3, Art. 193 para. 4 and Art. 194 para. 2 Federal Constitution), the Federal Assemblyshall declare the initiative to be invalid as a whole or in part, to the extentthat this is required.

(2) There is cohesion of subject matter ina popular initiative when there is an intrinsic connection between theindividual parts of the initiative.

(3)  There is consistency of form ina popular initiative when the initiative is couched exclusively in the form ofa general proposal or of a specific draft provision.

FEDERAL ACT ONPARLIAMENT

(Adopted 2002; last amended 2011)

http://www.admin.ch/ch/e/rs/c171_10.html

Title 5. Procedure in the Federal Assembly

Chapter 3. Procedure for Popular Initiatives

Section 2: Popular Initiative for the Partial Revision of theFederal Constitution

a. General Provisions

Art. 98 Validity of popular initiatives

(1) The Federal Assembly shall declare a popular initiative wholly or partlyinvalid if it holds that the requirements of Article 139 paragraph 3 of theFederal Constitution have not been fulfilled.