contained therein. 2. The measures set forth in this Protocol shall be interpreted and applied in a way that is not discriminatory to persons on the ground that they are victims of trafficking in persons. The interpretation and application of those measures shall be consistent with internationally recognized principles of non-discrimination. Article 15 Settlement of disputes l. States Parties shall endeavor to settle disputes concerning the interpretation or application of this Protocol through negotiation. 2. Any dispute between two or more States Parties concerning the interpretation or application of this Protocol that cannot be settled through negotiation within a reasonable time shall, at the request of one of those States Parties, be submitted to arbitration. If, six months after the date of the request for arbitration, those States Parties are unable to agree on the organization of the arbitration, any one of those States Parties may refer the dispute to the International Court of Justice by request in accordance with the Statute of the Court. 3. Each State Party may, at the time of signature, ratification, acceptance or approval of or accession to this Protocol, declare that it does not consider itself bound by paragraph 2 of this article. The other States Parties shall not be bound by paragraph 2 of this article with respect to any State Party that has made such a reservation. 4. Any State Party that has made a reservation in accordance with paragraph 3 of this article may at any time withdraw that reservation by notification to the Secretary-General of the United Nations. 50