1 Notice of termination is unlawful where given by one party:
a.
on account of an attribute pertaining to the person of the other party, unless such attribute relates to the employment relationship or substantially impairs cooperation within the business;
b.
because the other party exercises a constitutional right, unless the exercise of such right breaches an obligation arising from the employment relationship or substantially impairs cooperation within the business;
c.
solely in order to prevent claims under the employment relationship from accruing to the other party;
d.
because the other party asserts claims under the employment relationship in good faith;
because the other party is performing Swiss compulsory military or civil defence service or Swiss alternative civilian service or a non-voluntary legal obligation.
2 Further, notice of termination given by the employer is unlawful when given:
a.
because the employee is or is not a member of an employees’ organisation or because he carries out trade union activities in a lawful manner;
b.
while the employee is an elected employee representative on the staff council for the business or on a body linked to the business and the employer cannot cite just cause to terminate his employment;
in the context of mass redundancies, without his having consulted the organisation that represents the employees or, where there is none, the employees themselves (Art. 335f).
3 The protection against termination of employment afforded pursuant to paragraph 2 letter b to an employee representative whose mandate has ended as a result of transfer of the employment relationship (Art. 333) continues until such time as the mandate would have expired had such transfer not taken place.192
190Amended by Annex No 3 to the FA of 6 Oct. 1995 on Alternative Civilian Service, in force since 1 Oct. 1996 (AS 1996 1445; BBl 1994 III 1609).