What is the required notice period for an employee resignation in Belgium?

In Belgium, supported employees are required to provide notice before resignation based on their seniority. The notice periods are as follows:

• Less than 3 months: 1 week
• 3 to 6 months: 2 weeks
• 6 to 12 months: 3 weeks
• 12 to 18 months: 4 weeks
• 18 to 24 months: 5 weeks
• 2 to 4 years: 6 weeks
• 4 to 5 years: 7 weeks
• 5 to 6 years: 9 weeks
• 6 to 7 years: 10 weeks
• 7 to 8 years: 12 weeks
• 8 years or more: 13 weeks