Opinion of Advocate General Emiliou delivered on 3 February 2022.#CC v Pensionsversicherungsanstalt.#Request for a preliminary ruling from the Oberster Gerichtshof.#Reference for a preliminary ruling – Social security for migrant workers – Regulation (EC) No 987/2009 – Article 44(2) – Scope – Old-age pension – Calculation – Taking into account of child-raising periods completed in other Member States – Article 21 TFEU – Free movement of citizens.#Case C-576/20.