Opinion of Advocate General Pitruzzella delivered on 26 February 2019.#V v Institut national d'assurances sociales pour travailleurs indépendants (Inasti) and Securex Integrity ASBL.#Request for a preliminary ruling from the Cour du travail de Liège.#Reference for a preliminary ruling — Coordination of social security systems — Migrant workers — Regulation (EC) No 883/2004 — Transitional provisions — Article 87(8) — Regulation (EEC) No 1408/71 — Article 14c(b) — Worker pursuing an activity as an employed person and an activity as a self-employed person in different Member States — Derogations from the principle that the legislation of a single Member State is to apply — Dual affiliation — Submission of a request to be subject to the legislation applicable pursuant to Regulation No 883/2004.#Case C-33/18.