Ideally, they will lay out a comprehensive list of measures going beyond tariffs and export subsidies to include, for example, domestic subsidies and discriminatory procurement provisions in stimulus packages and commit to not use them even where permitted by their existing international trade commitments.
Indeed, as conventional trade barriers, such as tariffs and import quotas, have come down over the past half-century, others, such as discriminatory regulations, have sprung up to take their place.