Teams of officials from Britain and Myanmar only will be allowed to observe progress in the Koh Tao murders case, not interfere with the Thai investigation process, Prime Minister Prayut Chan-o-cha said yesterday.
"They will have to respect our processes," he said. National police chief Somyot Pumpanmuang earlier met British ambassador Mark Kent and Myanmar ambassador Win Maung.
Gen Prayut said the police will not have to notify the envoys about every single aspect of the judicial process, but the diplomats can ask for clarification on issues if they have any questions.
Pol Maj Gen Paveen Pongsirin, deputy commander of Police Region 8, said the investigation report into the killing of British tourists Hannah Witheridge and David Miller last month is complete.
Myanmar nationals Win Zaw Htun and Zaw Lin have been charged with the murders and detained for the past 12 days.
Pol Maj Gen Paveen said prosecutors must now decide whether to indict the suspects in the case. The two have been charged with rape, murder and illegal entry to Thailand.
Thawatchai Siangjaew, director-general of Office of Public Prosecution Region 8, yesterday said he had told the parents of the victims they could join prosecutors in filing charges against the suspects.
Human rights advocate Surapong Kongchantuk said the suspects are facing charges of illegally entering the country, yet their employers have not been pulled up for employing or providing shelter to illegal migrants.
Meanwhile, Wannee Thaipanich, president of the Tourism Promotion Association of Koh Samui and Koh Phangan, said the full moon party on Koh Phangan's Haad Rin beach must be better regulated to boost the image of tourism in the South.
The party has been going on almost every night when it should really only be held once a month, she said.
"There are too many parties, without focusing on the quality of the tourism," Ms Wannee said, adding it is time to reorganise events on the island, as earlier suggested by Gen Prayut.
Business operators on Haad Rin must enforce stricter measures to lift safety standards and make it a drug-free party, she said.
All tourists should have to pay a 100 baht entrance fee and be given a wristband when entering the party, so they can get a shuttle service back to their hotel if they get drunk.
Tourists under the age of 18 will not be allowed to enter the party without their parents, she said, adding that officials will step up safety measures at piers and set up a full moon party administration centre on the beach.
The pier checkpoints will inspect boats to make sure they are safe. Koh Phangan mayor Thaweesak Inprom said all boat crew members will also be tested for drugs. Revellers under 18 will be barred from the parties, he added.
The mayor said the island will be under surveillance 24 hours a day once CCTV is installed at the beach and around Koh Phangan.
He said a safety training course will be organised for police, volunteers, and representatives from the tourism association before the party is held every month.
Aside from the main full moon party, Mr Thaweesak said there are "half moon" and "black moon" parties held by private business operators on the island. He said the party organisers must be responsible for the safety of their guests.