Parallel employment
Article 9
1. Member States shall ensure that an employer neither prohibits a worker from taking up employment with other employers, outside the work schedule established with that employer, nor subjects a worker to adverse treatment for doing so. 2. Member States may lay down conditions for the use of incompatibility restrictions by employers, on the basis of objective grounds, such as health and safety, the protection of business confidentiality, the integrity of the public service or the avoidance of conflicts of interests.