Canon 1176 §3. The Church earnestly recommends that the pious custom of burying the bodies of the deceased be observed; nevertheless, the Church does not prohibit cremation unless it was chosen for reasons contrary to Christian doctrine.
The cremated remains of a body should be treated with the same respect given to the human body from which they come. This includes the use of a worthy vessel to contain the ashes, the manner in which they are carried, and the care and attention to appropriate placement and transport, and the final disposition. The cremated remains should be buried in a grave or entombed in a mausoleum or columbarium. The practice of scattering cremated remains on the sea, from the air, or on the ground, or keeping cremated remains on the home of a relative or friend of the deceased are not the reverent disposition that the Church requires.
Though the Church prefers that the body be present at the funeral and buried in a Catholic cemetery, the Church does permit cremation either before or after the funeral. If cremation is to take place the remains are to be buried in a similar manner that a body would be. Remains should not be scattered or separated.
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