The government has said it will allow state and private agencies to apply to use the royal emblem marking the coronation of His Majesty the King until May 4, after already granting permission to 587 applicants.
They can attach the symbol on yellow cloth, a colour representing the King's birthday, and other items to join the country in celebrating the ceremony, scheduled to be held from May 4-6.
As many as 650 applications have been sent to a sub-panel under the Prime Minister's Office for consideration.
It has authorised 487 applicants to make a total of 7.6 million yellow polo shirts. The office has also permitted 59 to use it on hats, 23 for cutouts and booths, nine for printed media and two for clocks, according to Prapasri Boonwises, the deputy permanent secretary for the PM's Office who also chairs the sub-panel.
Meanwhile, people in Khon Kaen have been rehearsing a ritual to collect water from an 800-year-old pond in preparation for using sacred water during the King's coronation.
Provincial governor Somsak Changtrakul presided over the rehearsal on Wednesday. It involved collecting water from the Ku Praphachai water source in Nam Phong district and taking it to a blessing ceremony at Wat Nong Waeng, a revered temple in Muang district.
"Our preparations are now complete," Mr Somsak said. "We are looking forward to performing the ritual on April 6 at 11.52am."
The water-collecting ritual is based on a Brahmin tradition of worshipping deities at the pond.
Ku Praphachai is one of 108 sacred sources from which water will be collected. The 22-metre-long pond is believed to have been built during the reign of King Jayavarman VII in the 12th century.
The water from the pond will be blessed by 30 monks on April 8.
All of the sacred water will be delivered to Wat Suthat Thepphawararam in Bangkok for a final blessing ceremony on April 18.
