§1. If a church cannot be used in any way for divine worship and there is no possibility of repairing it, the diocesan bishop can relegate it to profane but not sordid use.
§2. Where other grave causes suggest that a church no longer be used for divine worship, the diocesan bishop, after having heard the presbyteral council, can relegate it to profane but not sordid use, with the consent of those who legitimately claim rights for themselves in the church and provided that the good of souls suVers no detriment thereby.
Source: Code of Canon Law (Vatican.va)