What does semi-autonomous mean?

Article 2(1) of Decree Law 2/ 2020, states that the Customs Authority is an administrative service of the State, endowed with administrative autonomy. Furthermore, Article 2(2) of Decree Law 2/ 2020 states that the Customs Authority works in direct dependence of the member of Government responsible for the area of finance. In other words, we report hierarchically to the Minister of Finance, and we only have autonomy over our administrative functions.