The National Broadcasting and Telecommunications Commission (NBTC) is again revising its policy to support the satellite platform in a bid to increase digital TV viewership.
"The change is because we admit satellite TV still dominates the TV industry in Thailand," NBTC member Supinya Klangnarong said.
Some 70% of Thais still watch digital channels via the satellite platform, which offers more channels.
Most Thais have little grasp of digital TV, making them less interested in redeeming subsidy coupons.
The NBTC previously planned to let satellite TV providers take part in the digital TV coupon scheme, but the idea drew opposition from some digital TV operators and civic groups.
The NBTC's broadcasting panel agreed to amend its regulations for the must-carry rule and channel numbering.
Going forward, satellite and cable TV providers can arrange the first 10 channels as they like but must not include digital TV.
For cable TV operators, they cannot choose only some digital channels to air on their platforms — if they want to have digital TV, they must air all 27 digital channels.
There are 24 digital channels and three analogue channels that have migrated to the digital system.
The amendments are aimed at creating a level playing field.
Some channels now pay extra fees to satellite providers in exchange for a better channel number.
The NBTC is in talks with digital TV providers to transmit high-definition (HD) signals belonging to seven digital TV channels directly via the satellite TV platform.
This will solve problems related to unclear signals in remote areas, Ms Supinya said.
Satellite TV providers have strong marketing and promotions, offering to accept a digital TV set-top box in exchange for a satellite box, but they are barred from the NBTC's coupon scheme.
Some HD satellite boxes are priced lower than digital TV boxes.
"Changing consumers' behaviour is very difficult, so the regulator will focus on accessibility, not technology adoption," Ms Supinya added.