Opinion of Advocate General Szpunar delivered on 28 February 2019.#European Commission v Federal Republic of Germany.#Failure of a Member State to fulfil obligations — Services in the internal market — Directive 2006/123/EC — Article 15 — Article 49 TFEU — Freedom of establishment — Fees of architects and engineers for planning services — Minimum and maximum tariffs.#Case C-377/17.