A map of the country with provinces marked out in red, orange, yellow or green will be released by the CCSA on a daily basis.
So far, of the 30 provinces where Covid-19 cases have been confirmed, Samut Sakhon is the only one marked out in red. Provinces marked out in orange, signifying more than 10 cases, include Bangkok, Samut Songkhram, Ratchaburi and Nakhon Pathom.
Provinces marked out in yellow, where fewer than 10 cases have been found, are Saraburi, Samut Prakan, Suphanburi, Nonthaburi, Pathum Thani, Uttaradit, Chachoengsao, Kamphaeng Phet, Phetchabun, Ayutthaya, Phuket, Phetchaburi, Nakhon Ratchasima, Prachinburi, Krabi, Khon Kaen, Chai Nat, Udon Thani, Phichit, Nakhon Si Thammarat, Surat Thani, Prachuap Khiri Khan, Chaiyaphum, Nakhon Sawan and Ang Thong.
The rest of the provinces were marked in green to show no Covid-19 cases have been reported in the new wave of infections.
CCSA spokesperson Dr Taweesin Visanuyothin said no gatherings will be allowed in provinces marked out with red, while residents in orange-coded provinces will only be allowed small personal gatherings.
However, small events will be allowed in yellow and green-coded areas.