Single chapter.

The provisions of this book are applicable in the establishments of private law employers. They also apply to public industrial and commercial establishments.

The establishment of internal regulations is compulsory in undertakings or establishments employing at least fifty employees. The obligation provided for in the first paragraph applies at the end of a period of twelve months from the date on which the threshold of fifty employees is reached, in accordance with article L. 2312-2. Special provisions may be established for a category of personnel or a division of the company or establishment.