You misunderstand. Tariffs have always been in place like this. They are just expanded now. Enacted in 1988 via the Omnibus Trade and Competitiveness Act, the HTS replaced the older Tariff Schedules of the United States and took effect January 1, 1989. It aligns with the World Customs Organization's HS, adopted globally by over 200 countries. https://hts.usitc.gov/

You can see the archive going to "2015 and older" here https://hts.usitc.gov/download/archive