1829条
遺嘱者遺嘱ノ全部又ハ一部ヲ廃棄スル意思ヲ明言シタルトキハ其廃棄ハ明瞭ノモノトス但シ其意思ハ遺嘱ノ法式ノ一ニ従ヒ作リタル証書ニ之ヲ明言スルコトヲ要ス
400. Where a testator or testatrix has, in conformity with the formalities of will, mentioned in the document his or her intent to revoke the will in whole or in part, such revocation is an express one.