Opinion of Advocate General Tanchev delivered on 11 April 2019.#European Commission v Republic of Poland.#Failure of a Member State to fulfil obligations — Second subparagraph of Article 19(1) TEU — Rule of law — Effective judicial protection in the fields covered by Union law — Principles of the irremovability of judges and judicial independence — Lowering of the retirement age of Supreme Court judges — Application to judges in post — Possibility of continuing to carry out the duties of judge beyond that age subject to obtaining authorisation granted by discretionary decision of the President of the Republic.#Case C-619/18.