§1. Each parish is to have parochial registers, that is, those of baptisms, marriages, deaths, and others as prescribed by the conference of bishops or the diocesan bishop. The pastor is to see to it that these registers are accurately inscribed and carefully preserved.
§2. In libro baptizatorum adnotentur quoque adscriptio Ecclesiae sui iuris vel ad aliam transitus, necnon confirmatio, item quae pertinent ad statum canonicum christifidelium, ratione matrimonii, salvo quidem praescripto can. 1133, ratione adoptionis, ratione suscepti ordinis sacri, necnon professionis perpetuae in instituto religioso emissae; eaeque adnotationes in documento accepti baptismi semper referantur.
§3. Each parish is to have its own seal. Documents regarding the canonical status of the Christian faithful and all acts which can have juridic importance are to be signed by the pastor or his delegate and sealed with the parochial seal.
§4. In each parish there is to be a storage area, or archive, in which the parochial registers are protected along with letters of bishops and other documents which are to be preserved for reason of necessity or advantage. The pastor is to take care that all of these things, which are to be inspected by the diocesan bishop or his delegate at the time of visitation or at some other opportune time, do not come into the hands of outsiders.
§5. Older parochial registers are also to be carefully protected according to the prescripts of particular law.
Source: Code of Canon Law (Vatican.va)