to finance initial control activities against the desert locust in emergencies, provided that not more than $ 500 000 may be withdrawn in any one biennium for either the initial emergency measures for the control of outbreaks of livestock diseases, or for initial control activities against the desert locust, and that no expenditure will be incurred until the Director-General has consulted with the Chairman of the Finance Committee or another member of that Committee designated by him, and with the appropriate Advisory Panel referred to in this resolution;