2 Article 3. Information on national legislation The States Parties to the present Protocol shall communicate to the Secretary-General of the United Nations the laws and regulations which they may adopt to ensure the application of the present Protocol. Article 4. Settlement of disputes Any dispute between States Parties to the present Protocol which relates to its interpretation or application and which cannot be settled by other means shall be referred to the International Court of Justice at the request of any one of the parties to the dispute. Article 5. Accession The present Protocol shall be open for accession on behalf of all States Parties to the Convention and of any other State Member of the United Nations or member of any of the specialized agencies or to which an invitation to accede may have been addressed by the General Assembly of the United Nations. Accession shall be effected by the deposit of an instrument of accession with the Secretary-General of the United Nations. Article 6. Federal clause In the case of a Federal or non-unitary State, the following provisions shall apply: (a) With respect to those articles of the Convention to be applied in accordance with article I, paragraph 1, of the present Protocol that come within the legislative jurisdiction of the federal legislative authority, the obligations of the Federal Government shall to this extent be the same as those of States Parties which are not Federal States; (b) With respect to those articles of the Convention to be applied in accordance with article I, paragraph 1, of the present Protocol that come within the legislative jurisdiction of constituent States, provinces or cantons which are not, under the constitutional system of the Federation, bound to take legislative action, the Federal Government shall bring such articles with a favourable recommendation to the notice of the appropriate authorities of States, provinces or cantons at the earliest possible moment; (c) A Federal State Party to the present Protocol shall, at the request of any other State Party hereto transmitted through the Secretary-General of the United Nations, supply a statement of the law and practice of the Federation and its constituent units in regard to any particular provision of the Convention to be applied in accordance with article I, paragraph 1, of the present Protocol, showing the extent to which effect has been given to that provision by legislative or other action. Article 7. Reservations and declarations 1. At the time of accession, any State may make reservations in respect of article IV of the present Protocol and in respect of the application in accordance with article I of the present Protocol of any provisions of the Convention other than those contained in articles 1, 3, 4, 16(1) and 33 thereof, provided that in the case of a State Party to the Convention reservations made under this article shall not extend to refugees in respect of whom the Convention applies. 2. Reservations made by States Parties to the Convention in accordance with article 42 thereof shall, unless withdrawn, be applicable in relation to their obligations under the present Protocol.