However loosely such obligations may be defined, it is apparent that Australia, by depositing its instrument of ratification, bound itself to observe the terms of the Convention and assumed real and substantive obligations under them. Apart from the obligation to pay contributions (Art. 16), the most clearly defined obligations assumed by Australia under the Convention are those relating to properties, such as the Wilderness National Parks, which have been included, on Australia's nomination, in the World Heritage List. Such properties have been specifically identified as properties in respect of which obligations undertaken by Parties to the Convention are applicable (see Arts. 6(1) and (2), 11, 13). A main purpose of the provisions relating to establishing and keeping the World Heritage List with its requirement that a property be not entered without the agreement of the State in whose territory it is situated is to identify property which is indisputably subjected to the terms of the Convention. Those obligations include the primary "duty of ensuring", among other things, the protection, conservation and presentation of the relevant property (Art. 4) and an express undertaking to "endeavour, in so far as possible, and as appropriate for each country", to "take the appropriate legal, scientific, technical, administrative and financial measures necessary for the identification, protection, conservation, presentation and rehabilitation" thereof (Art. 5(d)). The burden of international obligation in respect of properties entered upon the World Heritage List is, at least to some extent, counterbalanced by the express recognition, on the part of other States Parties, that those properties constitute a world heritage "for whose protection it is the duty of the international community as a whole to co-operate" and by an express undertaking by such other States Parties, in accordance with the provisions of the Convention, to give their help in the identification, protection, conservation and preservation of such properties (Art. 6). For its part, the World Heritage Committee is required to receive and study requests for international assistance formulated by States Parties with respect to such properties (Art. 13). Such assistance may take the form of expert advice, labour, supply of equipment, interest-free loans and, in exceptional circumstances, non-repayable subsidies (Art. 22). Unless one is to take the view that over seventy nations have engaged in the solemn and cynical farce of using words such as "obligation" and "duty" where neither was intended or undertaken, the provisions of the Convention impose real and identifiable obligations and provide for the availability of real benefits at least in respect of those properties which have, in accordance with the procedure established by the Convention, been indisputably made the subject of those obligations and identified as qualified for those benefits by being entered, upon the nomination of the states in which they are situated, on the World Heritage List. Those obligations have been undertaken by Australia in relation to, amongst other "properties", the Wilderness National Parks.