Canon 864. Every unbaptised person, and only such a person, can be baptised.

Baptismi capax est omnis et solus homo nondum baptizatus.

Canon 865. §1 To be admitted to baptism, an adult must have manifested the intention to receive baptism, must be adequately instructed in the truths of the faith and in the duties of a christian, and tested in the christian life over the course of the catechumenate. The person must moreover be urged to have sorrow for personal sins.

§2 An adult in danger of death may be baptised if, with some knowledge of the principal truths of the faith, he or she has in some manner manifested the intention to receive baptism and promises to observe the requirements of the christian religion.

§1. Ut adultus baptizari possit, oportet voluntatem baptismum recipiendi manifestaverit, de fidei veritatibus obligationibusque christianis sufficienter sit instructus atque in vita christiana per catechumenatum sit probatus; admoneatur etiam ut de peccatis suis doleat.

§2. Adultus, qui in periculo mortis versatur, baptizari potest si, aliquam de praecipuis fidei veritatibus cognitionem habens, quovis modo intentionem suam baptismum recipiendi manifestaverit et promittat se christianae religionis mandata esse servaturum.

Canon 866. Unless there is a grave reason to the contrary, immediately after receiving baptism an adult is to be confirmed, to participate in the celebration of the Eucharist and to receive holy communion.

Adultus qui baptizatur, nisi gravis obstet ratio, statim post baptismum confirmetur atque celebrationem eucharisticam, communionem etiam recipiendo, participet.

Canon 867. §1 Parents are obliged to see that their infants are baptised within the first few weeks. As soon as possible after the birth, indeed even before it, they are to approach the parish priest to ask for the sacrament for their child, and to be themselves duly prepared for it.

§2 If the infant is in danger of death, it is to be baptised without any delay.

§1. Parentes obligatione tenentur curandi ut infantes intra priores hebdomadas baptizentur; quam primum post nativitatem, immo iam ante eam, parochum adeant ut sacramentum pro filio petant et debite ad illud praeparentur.

§2. Si infans in periculo mortis versetur, sine ulla mora baptizetur.

Canon 868. §1 For an infant to be baptised lawfully it is required:

1° that the parents, or at least one of them, or the person who lawfully holds their place, give their consent;

2° there must be a founded hope that the infant will be brought up in the Catholic religion subject to §3; if such hope is altogether lacking, the baptism is to be delayed according to the prescripts of particular law after the parents have been informed of the reason.
[revised wording according to m.p. De concordia inter Codices, 31.V.2016]

§2 An infant of catholic parents, indeed even of non-catholic parents, may in danger of death be baptised even if the parents are opposed to it.

§3. The child of non-Catholic Christians is lawfully baptized if the parents or at least one of them or the one who legitimately takes their place requests it and if it is impossible for them, physically or morally, to approach their own minister.
[new paragraph added by m.p. De concordia inter Codices, 31.V.2016]

§1. Ut infans licite baptizetur, oportet:

1° parentes, saltem eorum unus aut qui legitime eorundem locum tenet, consentiant;

2° spes habeatur fundata eum in religione catholica educatum iri, firma §3; quae si prorsus deficiat, baptismus secundum praescripta iuris particularis differatur, monitis de ratione parentibus.

§2. Infans parentum catholicorum, immo et non catholicorum, in periculo mortis licite baptizatur, etiam invitis parentibus.

§3. Infans christianorum non catholicorum licite baptizatur, si parentes aut unus saltem eorum aut is, qui legitime eorundem locum tenet, id petunt et si eis corporaliter aut moraliter impossibile sit accedere ad ministrum proprium.

Canon 869. §1 If there is doubt as to whether a person was baptised or whether a baptism was conferred validly, and after serious enquiry this doubt persists, the person is to be baptised conditionally.

§2 Those baptised in a non-catholic ecclesial community are not to be baptised conditionally unless there is a serious reason for doubting the validity of their baptism, on the ground of the matter or the form of words used in the baptism, or of the intention of the adult being baptised or of that of the baptising minister.

§3 If in the cases mentioned in §§1 and 2 a doubt remains about the conferring of the baptism or its validity, baptism is not to be conferred until the doctrine of the sacrament of baptism is explained to the person to be baptised, if that person is an adult. Moreover, the reasons for doubting the validity of the earlier baptism should be given to the person or, where an infant is concerned, to the parents.

§1. Si dubitetur num quis baptizatus fuerit, aut baptismus valide collatus fuerit, dubio quidem post seriam investigationem permanente, baptismus eidem sub condicione conferatur.

§2. Baptizati in communitate ecclesiali non catholica non sunt sub condicione baptizandi, nisi, inspecta materia et verborum forma in baptismo collato adhibitis necnon attenta intentione baptizati adulti et ministri baptizantis, seria ratio adsit de baptismi validitate dubitandi.

§3. Quod si, in casibus de quibus in §§1 et 2, dubia remaneat baptismi collatio aut validitas, baptismus ne conferatur nisi postquam baptizando, si sit adultus, doctrina de baptismi sacramento exponatur, atque eidem aut, si de infante agitur, eius parentibus rationes dubiae validitatis baptismi celebrati declarentur.

Canon 870. An abandoned infant or a foundling is to be baptised unless diligent enquiry establishes that it has already been baptised.

Infans expositus aut inventus, nisi re diligenter investigata de eius baptismo constet, baptizetur.

Canon 871. Aborted foetuses, if they are alive, are to be baptised, in so far as this is possible.

Fetus abortivi, si vivant, quatenus fieri potest, baptizentur.