Even in the situation of free trade, there are some restrictions put by government to stop free trade like limiting exports.
Explanation:
Free trade is a situation when there are no restrictions put up by the government on the trading of the goods and the services. People have access to market and can have unregulated access to the market information also.
But even in the situation of free trade, the government of the country can put up restrictions on the exports of the natural resources of the country which might put up a barrier in trading freely.