Federal Act
on the Federal Assembly
(Parliament Act, ParlA)

¹ Elec­tions in re­spect of va­cant seats are nor­mally held in the ses­sion fol­low­ing re­ceipt of the let­ter of resig­na­tion of the mem­ber, fol­low­ing a mem­ber un­ex­pec­tedly va­cat­ing his or her seat or fol­low­ing the de­clar­a­tion that the mem­ber is un­able to dis­charge his or her du­ties of of­fice.¹⁴⁵

² The newly elec­ted mem­ber as­sumes of­fice at the latest two months after his or her elec­tion.

³ If elec­tions are held to more than one va­cant seat, the or­der in which the elec­tions are held is de­term­ined by the length of peri­od in of­fice of the pre­vi­ous of­fice hold­er.