"[1]Mainline Christian theology (including Roman Catholic, Eastern Orthodox, Oriental Orthodox, Church of the East, Anglican, Lutheran and most other Protestants) has traditionally held that only one baptism is valid to confer the benefits of this sacrament.
In that case, a conditional baptism is later performed by an ordinary minister of the sacrament with certainly valid matter.
Thus, if it is uncertain whether the baptizand is dead (i.e., their soul has parted from the body; this is the case for the first few hours or so after death in the modern sense), the formula is "If you are alive, I baptize [...]".
In severe cases of birth anomaly, the (practically, always emergency) baptism formula is "If you are a human being, I baptize [...]".
[6] Likewise, if an emergency baptism has been performed over a part of the body other than the head (practically: during birth), or on a pregnant woman's womb (for the unborn child), the child is to be conditionally rebaptized (with the usual "if you are not baptized") even though the emergency baptisms should be performed in this way if necessary.