All [persons] are fit to declare an erech-vow or be the subject of an erech-vow, to vow [another’s worth] or to have their worth vowed: Kohanim, Leviim, Yisraelim, women and slaves. A person of undetermined gender and a hermaphrodite are fit to vow [another’s worth], or to have their worth vowed, and are fit to declare an erech-vow, but not to be the subject of an erech-vow; for one cannot be the subject of an erech-vow unless he is definitely male or definitely female. A deaf-mute, a mentally incompetent person, and a minor are fit to have their worth vowed and to be the subject of an erech-vow, but they are not fit to vow [someone’s worth] or to declare an erech-vow, because they have no understanding. [An infant] less than a month old is fit to have his worth vowed, but not to be the subject of an erech-vow.