An infant girl who is 1 day old can become tamei by [discharging] niddah [blood]. A girl who is 10 days old can become tamei by [discharging] zivah [blood].  An infant boy who is 1 day old can become tamei by [emitting] zivah [fluid]. [Further-more,] he can become tamei by [contracting] tzaraas afflictions; he can become tamei from a corpse; he binds for yibum and he releases from yibum; he causes [others] to eat terumah and he disqualifies [others] from [eating] terumah; he inherits and bequeaths; one who kills him is liable; and he is to his father, his mother, and all his relatives like a full-fledged bride-groom.

A girl who is 3 years and 1 day old can be betrothed through cohabitation, and if [her] yavam cohabits with her, he acquires her. [Furthermore,] one is liable on account of her for [committing adultery with] a married woman; she causes one who cohabits with her to become tamei to [the degree that he will] render a bottom couch [as] tamei as that which is on top; [if] she is fully married to a Kohen, she may eat terumah; [if] one of the disqualified men cohabits with her, he disqualifies her from the Kehunah; [and if] any one of the arayos [forbidden partners] mentioned in the Torah cohabits with her, he is put to death because of her, but she is not liable [to punishment].  [Cohabitation with a girl] younger [in age] than this is like poking a finger in the eye.

A boy who is 9 years and 1 day old who cohabits with his yevamah acquires her, but he cannot give [her] a bill of divorce un-til he reaches adulthood. [Furthermore,] he becomes tamei [by cohabiting] with a niddah to [the degree that he will] render a bottom couch [as] tamei as that which is on top; he disqualifies [a woman with whom he cohabits], [but] he does not cause [the woman] to eat terumah; he disqualifies an animal from [being offered] on the Altar, and [the animal] is stoned [to death] on his account; and if he cohabits with any one of the arayos [forbidden partners] mentioned in the Torah, they are put to death on his account, but he is not liable [to punishment].

A girl [who is] 11 years and 1 day old, her vows are examined; a girl [who is] 12 years and 1 day old, her vows stand; and [a girl’s vows] are examined [her] entire 12th [year].  A boy [who is] 12 years and 1 day old, his vows are examined; a boy [who is] 13 years and 1 day old, his vows stand; and [a boy’s vows] are examined [his] entire 13th [year].  Before this time, even if they say, “We know unto Whom we vowed,” [or “We know] unto Whom we consecrated,” their vows are not [valid] vows, and their consecrations are not [valid] consecrations.  After this time, even if they say, “We do not know unto Whom we vowed,” [or “We do not know] unto Whom we consecrated,” their vows are [valid] vows, and their consecrations are [valid] consecrations.