Cujus est divisio, alterius est electio
Defined in 1 dictionary — Black's (1910)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Whichever [of two parties] has the division, [of an estate,] the choice [of the shares] is the other's. Co. Litt 166b. In partition between coparceners, where the division is made by the eldest, the ruie in English law is that she shall choose her share last. Id.; 2 Bl. Comm. 189; 1 Steph. Comm. 323.