Safeguard duty may be imposed to prevent market disruption; provisional duty must be withdrawn if findings are negative. Central Government may, by notification under section 8C, impose a safeguard duty on the imported article not exceeding the amount found adequate to prevent or remedy market disruption; if the Director General's final finding is negative contrary to the prima facie evidence, the Government must withdraw any provisional duty imposed under sub section (2) of section 8C within thirty days of publication of the final findings.