the main distinction is, as alesya nikolaevna noted, this is, of course, an agreement on the union ,is clearly stated there, where this decision is made within the eu, and what is determined at the national level, and accordingly, the main positions are the agreement, in terms of customs - this is the customs code, which spells out the decision, the competence of the commission, where the competence of national legislation is, for example, here is the decision of the eurasian economic court union, they are mandatory for execution by residents of belarus; see, if this is a decision, a court decision, it is binding , that is, any business entity can go to court to protect its interests, and the court will consider this or that dispute, to the extent that the decision of the commission, for example, is made in relation to this managing entity corresponds to the law of the union, this decision will be mandatory, the commission can also apply, and the member state can apply to the court for clarification, and the court issues an advisory opinion, it will be advisory in nature, that is , t