A/RES/52/226 Page 3 11. Also regrets that the information requested in paragraphs 18 and 37 of its resolution 51/231 was not provided in the report of the Secretary-General, and emphasizes that immediate action should be taken for the full implementation of the resolution; 12. Further regrets that, despite the initial efforts of the Secretary-General, the supplier roster is still not representative of the membership of the Organization, and requests him to intensify further and focus his efforts to broaden the geographical base of the supplier roster; 13. Requests the Secretary-General to take all possible measures to increase procurement from developing countries and countries with economies in transition, including the following measures: (a) All invitations to bid should be posted on the Procurement Division Web site homepage as soon as they are prepared, in accordance with the Financial Regulations and Rules of the United Nations; (b) All invitations to bid should be sent to the permanent missions, as well as to all United Nations information centres and other United Nations offices; (c) Procurement Division officials may undertake visits to developing countries and countries with economies in transition to attend seminars and exhibitions, with a view to identifying potential vendors from those countries; (d) All commercial opportunities should be published in Development Business, which is issued by the Office of Communications and Public Information of the Secretariat; 14. Also requests the Secretary-General to examine ways to increase opportunities for developing countries in the award of procurement contracts, in particular least developed countries, African countries and countries with economies in transition, taking into account the experience of preferential treatment in this regard in the funds and programmes of United Nations organizations and other intergovernmental institutions, and to report thereon to the General Assembly at its fifty-third session; 15. Further requests the Secretary-General to examine the possibility of awarding procurement contracts to equally qualified vendors from countries that are current in the payment of their assessed contributions, taking into account the experience of other intergovernmental institutions with such practices, and to report thereon to the General Assembly at its fifty-third session; 16. Requests the Secretary-General to develop a standard procedure for the preparation of performance evaluation reports on suppliers, as requested by the General Assembly in paragraph 15 of its resolution 51/231; 17. Reiterates its concern about the use of suppliers recommended by requisitioners and, noting that this practice undermines the principle of segregation of responsibilities between requesting and procurement entities, requests the Secretary-General to discontinue the practice; 18. Requests the Secretary-General to revise paragraphs (f) and (g) of financial rule 110.19 to include professional services, medicines, medical supplies, hospital or surgical supplies and prosthetic appliances in the open bidding process; /...