Case T-279/19: Judgment of the General Court of 29 September 2021 — Front Polisario v Council (External relations — International agreements — Euro-Mediterranean Association Agreement EC-Morocco — Agreement in the form of an Exchange of Letters on the amendment of Protocols 1 and 4 to the Euro-Mediterranean Agreement — Decision approving the conclusion of the agreement — Action for annulment — Admissibility — Capacity to be a party to legal proceedings — Direct concern — Individual concern — Territorial scope — Jurisdiction — Interpretation of international law adopted by the Court — Principle of self-determination — Principle of the relative effect of treaties — Possibility of relying thereon — Concept of consent — Implementation — Discretion — Limits — Maintaining the effects of the contested decision)