Pursuant to Article 108 of the Labor Code 2019 stipulates: The employer has the right to require the employee to work overtime on any day without limitation on the prescribed number of overtime hours and the employee does not be refused in the following cases: - Carry out mobilization and mobilization orders to ensure national defense and security tasks in accordance with law; - Perform work to protect human life and property of agencies, organizations, and individuals in preventing and overcoming consequences of natural disasters, fires, dangerous epidemics, and catastrophes, except for the following cases: there is a risk of affecting the life and health of employees in accordance with the provisions of the law on occupational safety and sanitation.