The employer must make sure that the working hours and break times of a worker with multiple jobs comply with the law.
Having more than one job is allowed by law. However, the worker has an obligation of loyalty to their employer and must ensure that they fulfill that obligation. They may choose to have an additional job only on the condition that this does conflict with their employer, that this does not damage the reputation of the company where they are employed and that their additional job does not have any negative consequences on their work.
An employer wishing to proceed with recruitment must itself check that the worker’s jobs comply with law, for health reasons among others. The regulations on maximum working hours and minimum break times must be respected, even when adding together hours worked with different employers. An employer may suspect that the worker is doing multiple jobs, particularly if that worker applies for part-time work.