The Video Assistant Referee (VAR) system will not be used at the AFF Suzuki Cup, the Football Association of Thailand confirmed on Tuesday.
The Asean championship will be held in Singapore from Dec 5-Jan 1.
FAT secretary-general Patit Supaphong said the technology will not be used in the biennial event due to several problems.
"VAR is not just about setting up the device. You need a licence and referees, both on the pitch and in the control rooms, who are familiar with it," Patit said. "We have to admit that not many referees in Asean are familiar with VAR. Even hosts Singapore do not use VAR [in their league]."
Patit added that in the tournament when two or more teams have the same number of points, results among the teams involved will be used first to determine their positions.
Five-time champions Thailand will face Timor Leste in their first match on Dec 5. The other teams in Group A are Singapore, Myanmar and the Philippines.
Defending champions Vietnam are in Group B with Malaysia, Indonesia, Cambodia and Laos. The top two teams in each group reach the semi-finals.
The 2020 edition of the regional tournament has been postponed from last year due to Covid-19. The event is normally played on a home-and-away basis but the Asean Football Federation (AFF) has decided to organise the championship in one country due to the pandemic.
It will be Mano Polking's first assignment as coach of Thailand.
The German-Brazilian coach has vowed to bring the Suzuki Cup back to Thailand.