AN international effort should be made to protect jobs and businesses threatened by increasing harmonisation of world trade, the United Nations Commission on International Trade Law said yesterday. But it said the safeguards should be developed through closer co-operation rather than new laws. The commission made its call at the end of a two-day conference in Vienna attended by about 100 delegates from 29 countries, including Hong Kong. Gerold Herrmann, the commission's secretary, said: ''This has been an historic opportunity to advance international trade harmonisation. ''There are some very worthwhile suggestions from delegates which we will now look at more closely and prepare a report. ''It is in every nation's interests to assist in the reconciliation of insolvency law.'' Stephen Adamson, president of Insol, a federation of associations specialising in insolvency, said: ''There was a mood that rather than wait for a worldwide model to provide the ideal solution, which could take hundreds of years to achieve, we should take the initiative and progress harmonisation step by step.'' Delegates called for the establishment of a specialised court in countries where international insolvencies could be ruled on. Carl Felsenfeld, an American banking law expert and delegate, said: ''Probably the best way to reach agreement is to approach the subject with a strong business sense of what is involved and who benefits from the various processes and methods. ''What we can do is stimulate an environment whereby business people can get together, exchange ideas and reach the best possible solutions.''