VATICAN CITY (AP) — The Vatican's saint-making office has updated its rules governing the use of relics for would-be saints, issuing detailed new guidelines Saturday that govern how body parts and cremated remains are to be obtained, transferred and protected for eventual veneration.

The instructions explicitly rule out selling the hair strands, hands, teeth and other body parts of saints that often fetch high prices in online auctions. They also prohibit the use of relics in sacrilegious rituals and warn that the church may have to obtain consent from surviving family members before unearthin...