Safeguard measures: Central government can amend customs notifications to implement trade agreement protections; bilateral safeguards end if global measure applies. Central government may amend customs notifications under section 25(1) of the Customs Act to implement India Singapore Trade Agreement safeguard measures on products covered by the Director General's final findings to prevent or remedy serious injury and facilitate positive adjustment. A proviso prevents any bilateral safeguard on an article while a global safeguard on that article is in force; imposition of a global safeguard terminates any existing bilateral safeguard, and upon termination the rate of duty reverts to the rate that would have applied but for the bilateral action.