Cambodia’s King Norodom Sihamoni on Monday issued a royal decree to appoint Hun Sen’s eldest son Hun Manet as the country’s prime minister, ensuring that the transfer of power from father to son will occur later this month.

According to the decree, Hun Manet will assume the office on Aug. 22, when the newly elected National Assembly adopts the new cabinet. It will be the completion of years of preparation for a transfer of power from father to son, as the 71-year-old Hun Sen, who has ruled the country since 1985, prepares to step aside.

Hun Sen did however say that he would continue to have a role in government for the next 10 years.