According to the Cambodian Labour Law, Undetermined Duration Contract is an employment contract made between workers and an employer with the following criteria:

  1. Both parties agree upon without setting a specific ending date (Article 67, Paragraph 1) or
  2. Both parties agree upon, setting a specific ending date but this duration is more than two years (Article 67, Paragraph 2) or
  3. This contract is made orally, not in writing (Article 67, Paragraph 7) or
  4. In case a Fixed Duration Contract continues quietly (without notice) and the total duration of the previous contract and the new contract exceeds two years. (Article 67, Paragraph 8)

Source: https://www.gmac-cambodia.org/public/pdf_file/1505126368.pdf