Thai Prime Minister Prayuth Chan-Ocha said on Tuesday, 15 days of mourning for King Bhumibol Adulyadej must be observed before his successor can ascend the throne.
King bhumibol died last Thursday (October 13) at the age of 88 after seven decades on the throne.
The prime minister said last week that the coronation of Crown Prince Vajiralongkorn would take place after the cremation of his father, which will follow a year of mourning.
However, the prince can become king before his official coronation.