14 All Eastern Rite priests, either in conjunction with Baptism or separately from it, can confer this sacrament validly on all the faithful of any rite including the Latin; licitly, however, only if the regulations both of the common and the particular law are observed. Priests, also, of the Latin Rite, in accordance with the faculties they enjoy in respect to the administration of this sacrament, validly administer it also to the faithful of Eastern Churches; without prejudice to the rite, observing in regard to licitness the regulations both of the common and of the particular law.
Source: Orientalium Ecclesiarum (Vatican.va)