A Vatican document says the Church should consider ordaining older married men as priests in remote areas of the Amazon, a historic shift which some say could pave the way for their use in other areas where clergy are scarce.
The recommendation, contained in a working document prepared by the Vatican for a synod of bishops from the Amazon scheduled for October, also called for some kind of "official ministry" for women in the area, although it did not elaborate.
Only priests can say Mass or hear confessions, meaning that Catholics in isolated communities in the Amazon can go for many months without participating in either of the sacraments.
It was the most direct mention ever in a Vatican document of the possibility of a married priesthood, albeit limited, and a greater ministerial role for women in one area of the world.
The document spoke of the possibility of ordaining what are known as viri probati - Latin for men of proven character - to deal with the shortage of priests. Such men would be elderly, outstanding members of the local Catholic community and with grown-up families.
"While affirming that celibacy is a gift for the Church, there have been requests that, for the most remote areas of the region, (the Church) studies the possibility of conferring priestly ordination on elderly men, preferably indigenous, respected and accepted members of their communities," the document said.
Pope Francis, in an interview with a German newspaper in 2017, said he was willing to consider ordaining "viri probati" men as priests in isolated communities.
But he ruled out a general opening the priesthood to all married men or watering down the Catholic Church's commitment to celibacy, seen as a virtue that frees priests to devote their lives fully to serve God.
The synod on 6-27 October at the Vatican will include bishops and other representatives, including indigenous peoples, from Brazil, Bolivia, Peru, Ecuador, Colombia, Venezuela, Guyana, Suriname and French Guyana.
At the end of their conference, participants will vote on various articles in a final document, which will then go to the pope, who will decide whether to make it an official Apostolic Exhortation based on the synod meetings.
The document also issues a strong defence for the protection of the environment in the Amazon, from deforestation, illegal mining and development projects that threaten native cultures and the delicate ecosystem vital for the planet.