"We will not hesitate to adopt the full scope of sanctions to protect our citizens if audits do not show full compliance," Breton said.
TikTok said in response that it was committed to the DSA, and had also outlined its efforts to comply with other EU legislation, such as GDPR data protections rules and a code of practice on disinformation.
"The safety of our users is paramount," Caroline Greer, TikTok's director of public policy and government relations, tweeted.
It is not acceptable that behind seemingly fun and harmless features, it takes users seconds to access harmful and sometimes even life-threatening content," Breton said.
"The DSA includes dissuasive sanctions including a ban in the EU in case of repeated serious breaches threatening the life or safety of people," he said.