Questão jurídica principal
How to interpret the contractual clause 'the notice period is 1 month during the first 3 months, later 2 months'
Decisão extraída
The clause did not clearly and unmistakably establish a written probation-extension agreement; it had to be understood against the employer under the ambiguity rule.
Fundamentação extraída
A deviation from the statutory probation regime must be clear in writing. The wording resembled notice-period regulation under Art. 335c OR and did not clearly refer to probation.