for it is his right, and rights cannot be taken from their owners against their will.
The right of pre-emption is shared by two in proportion to their respective shares. If one of them waives it, the other must either take the whole of it or leave it. If two people purchase a single share, or the reverse, or if one person purchases two portions from two plots of land in a single transaction, the pre-emptor may take one of them …
His statement, “The right of pre-emption is shared by two in proportion to their respective shares. If one of them waives it, the other must either take the whole of it or leave it”: pre-emption being shared by two entails that there are three partners. It is apportioned according to their respective shares, not according to the number of persons.
For example, a plot of land is owned by three partners: one owns a half, the second a third, and the third a sixth. Their shares therefore total six: the owner of the half has three, the owner of the third has two, and the owner of the sixth has one. If one of them sells, the right of pre-emption belongs to his two partners.
Let us begin with the largest share, that of the owner of the half. If the owner of the half sells his share, which is three, the calculation is reduced to three, and ownership is then divided into thirds between the owner of the third and the owner of the sixth. If the owner of the third sells—and the third is two—four remain, and ownership is then divided into fourths between the owner of the half and the owner of the sixth. If the owner of the sixth sells, five remain, and ownership is then divided into fifths between the owner of the half and the owner of the third: the owner of the half has three, and the owner of the third has two.
If one of the two waives his right, we say to the other: either take all of it or leave all of it. Suppose that the owner of the half is the one who sold, leaving the half subject to pre-emption. If the owner of the sixth says, “I do not want the right of pre-emption; my share in this land is enough for me,” then we say to the owner of the third: either take all three shares, which constitute the half, in which case the owner of the third will have five and the owner of the sixth one; or, if he says, “I cannot afford it,” we say: then the right of pre-emption is forfeited.