Article 20 The return of the child under the provisions of Article 12 may be refused if this would not be permitted by the fundamental principles of the requested State relating to the protection of human rights and fundamental freedoms. CHAPTER IV – RIGHTS OF ACCESS Article 21 An application to make arrangements for organising or securing the effective exercise of rights of access may be presented to the Central Authorities of the Contracting States in the same way as an application for the return of a child. The Central Authorities are bound by the obligations of co-operation which are set forth in Article 7 to promote the peaceful enjoyment of access rights and the fulfilment of any conditions to which the exercise of those rights may be subject. The Central Authorities shall take steps to remove, as far as possible, all obstacles to the exercise of such rights. The Central Authorities, either directly or through intermediaries, may initiate or assist in the institution of proceedings with a view to organising or protecting these rights and securing respect for the conditions to which the exercise of these rights may be subject. CHAPTER V – GENERAL PROVISIONS Article 22 No security, bond or deposit, however described, shall be required to guarantee the payment of costs and expenses in the judicial or administrative proceedings falling within the scope of this Convention. Article 23 No legalisation or similar formality may be required in the context of this Convention. Article 24 Any application, communication or other document sent to the Central Authority of the requested State shall be in the original language, and shall be accompanied by a translation into the official language or one of the official languages of the requested State or, where that is not feasible, a translation into French or English. However, a Contracting State may, by making a reservation in accordance with Article 42, object to the use of either French or English, but not both, in any application, communication or other document sent to its Central Authority. Article 25 Nationals of the Contracting States and persons who are habitually resident within those States shall be entitled in matters concerned with the application of this Convention to legal aid and advice in any other Contracting State on the same conditions as if they themselves were nationals of and habitually resident in that State.