In any event, a failure to provide timely notice of such a change may eliminate the right of a Contracting State to invoke paragraph 3 (a) to avoid its obligations arising under paragraph 1.
无论如何，缔约国援用第3款(a)项避免履行由第1款所产生的各项义务的权利，可能因没有及时通报这项修改而被取消。