Opinion of Advocate General Saugmandsgaard Øe delivered on 6 June 2019.#X v Belgische Staat.#Request for a preliminary ruling from the Raad voor Vreemdelingenbetwistingen.#Reference for a preliminary ruling – Immigration policy – Status of third-country nationals who are long-term residents – Directive 2003/109/EC – Conditions for acquiring long-term resident status – Article 5(1)(a) – Stable, regular and sufficient resources.#Case C-302/18.