§1. At shrines the means of salvation are to be supplied more abundantly to the faithful by the diligent proclamation of the word of God, the suitable promotion of liturgical life especially through the celebration of the Eucharist and of penance, and the cultivation of approved forms of popular piety.
§2. Votive offerings of popular art and piety are to be kept on display in the shrines or nearby places and guarded securely.
Source: Code of Canon Law (Vatican.va)