"the same rules would apply to EU maybe competitors... if there were any." That can actually be an example of a tariff, though. Basically every country special

"the same rules would apply to EU maybe competitors... if there were any." That can actually be an example of a tariff, though. Basically every country specializes in something, and imports things they're not good at making. For example: cheese, or luxury watches, or GPUs. If you have a special law that charges companies money only for the categories you import and you carve out exceptions for "small" (aka domestic) markets, a la the DMA, you have effectively created a tariff.