▁a ▁new ▁legal ▁act . ▁This ▁act ▁was ▁signed ▁in ▁Tur in ▁on ▁ 2 4 ▁March ▁ 1 8 6 0 ▁by ▁Napoleon ▁III ▁and ▁Victor ▁Em manuel ▁II ▁of ▁Sav oy , ▁and ▁de als ▁with ▁the ▁an nex ation ▁of ▁Sav oy ▁( follow ing ▁the ▁French ▁neutral ity ▁for ▁the ▁ple b isc ites ▁held ▁in ▁T usc any , ▁Mod ena , ▁Par ma ▁and ▁Rom agna ▁to ▁join ▁the ▁Kingdom ▁of ▁S ardin ia , ▁against ▁the ▁Pope ' s ▁will ). ▁A ▁dem arc ation ▁agreement , ▁signed ▁on ▁ 7 ▁March ▁ 1 8 6 1 , ▁defined ▁the ▁new ▁border . ▁With ▁the ▁formation ▁of ▁Italy , ▁for ▁the ▁first ▁time ▁Mont ▁Bl anc ▁was ▁located ▁on ▁the ▁border ▁of ▁France ▁and ▁Italy . ▁ ▁The ▁ 1 8 6 0 ▁act ▁and ▁attached ▁maps ▁are ▁still ▁leg ally ▁valid ▁for ▁both ▁the ▁French ▁and ▁Italian ▁govern ments . ▁One ▁of ▁the ▁prints ▁from ▁the ▁ 1 8 2 3 ▁Sar de ▁Atlas ▁positions ▁the ▁border ▁exactly ▁on ▁the ▁sum mit ▁edge ▁of ▁the ▁mountain ▁( and ▁measures ▁it ▁to ▁be ▁ ▁high ). ▁The ▁convention ▁of ▁ 7 ▁March ▁ 1 8 6 1 ▁recogn ises ▁this ▁through ▁an ▁attached ▁map , ▁taking ▁into ▁consideration ▁the ▁limits ▁of ▁the ▁mass if , ▁and ▁drawing ▁the ▁border ▁on ▁the ▁ice cap ▁of ▁Mont ▁Bl anc , ▁making ▁it ▁both ▁French ▁and ▁Italian . ▁W aters hed ▁analysis ▁of ▁modern ▁top ographic ▁mapping ▁not ▁only