(1) Work between the hours of 9.00 p.m. and 6.00 a.m. is night work. In undertakings bound by a collective pay agreement, the employer and the employee's elected representatives may in writing decide another period of at least eight hours including the hours between 12.00 midnight and 6.00 a.m. Work in two shifts that fall between the hours of 6.00 a.m. and 12.00 midnight is not regarded as night work.(2) Night work is not permitted unless necessitated by the nature of the work.(3) The employer and the employee may enter into a written agreement that the employee, on his own initiative, may perform work between 9.00 p.m. and 11.00 p.m.(4) At undertakings bound by a collective pay agreement, the employer and the employee's elected representatives may enter into a written agreement concerning night work when there is an exceptional and time-limited need for it.(5) Before imposing night work, the employer shall discuss the necessity of so doing with the employees' elected representatives.(6) Normal working hours for an employee who regularly works more than three hours at night, shall on average not exceed eight hours per 24 hours. The average shall be calculated over four weeks. The minimum period for weekly off-duty time laid down in section 10-8, second paragraph, shall not be included in the calculation of the average.(7) Working hours for an employee who works more than three hours at night shall not exceed eight hours per 24 hours if the work involves an exceptional risk or considerable physical or mental strain.(8) An employee who mainly works at night shall be offered a medical examination before commencing employment and subsequently at regular intervals.(9) The employer and the employee's elected representatives at undertakings bound by a collective pay agreement may agree in writing that the provisions of the sixth and seventh paragraphs shall be departed from. In such case, the employees shall be ensured corresponding compensatory rest periods or, where this is not possible, other appropriate protection.
