Questão jurídica principal
Whether the agreed salary increase to CHF 4,800 was valid and continued after June 2004
Decisão extraída
The salary increase was validly agreed and was not subject to a written-form validity requirement or to a condition tied to the employee's role as branch manager.
Fundamentação extraída
The written-form clause was not a validity condition. The employer failed to prove a resolutive condition or the employee's consent to the later salary reduction.