Wildlife protection groups on Monday - World Elephant Day - urged the Prime Minister to deliver on her promise earlier this year to shut down the country's ivory trade.
In March, Prime Minister Yingluck Shinawatra gave an undertaking at the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) meeting to end the ivory trade in Thailand, one of the main hubs for the illicit traffic in African elephant tusks.
The government's ivory action plan is due to be submitted to cabinet this year, but no details have been made public.
"It's critical that the ivory action plan honours the prime minister's commitment and sets out the necessary legal reforms with a clear timeline to make it illegal to buy or sell ivory," said Janpai Ongsiriwittaya, of World Wildlife Fund-Thailand.
Trade in ivory sourced from domesticated Asian elephants is legal in Thailand, but conservation groups claim it has precipitated a large trade in smuggled African ivory that is processed and sold to tourists in shops or exported abroad.
"Ending the ivory trade in Thailand - currently the world's largest unregulated ivory market - would go a long way in stemming a global poaching crisis that is leading to the slaughter of tens of thousands of elephants each year," said Naomi Doak, TRAFFIC's Greater Mekong programme coordinator.