It probably would be a tough call to definitively list the requirements of the Catholic Church for conversion in 1920, I have found an outline for the modern day process online, if anything I would have thought the process in 1920 would probably be the same, but possibly the individuals committment to convert might have come under more scrutiny.
According to the modern criteriam, it reads like if a person has already been baptised they may not need to be re-baptised.
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step 1.Choose a church and begin attending Mass. Introduce yourself to the other parishioners and speak with them about the church. It may be helpful to attend Mass at more than one church. Pick one that appeals to you.
Step 2Contact the Parish Office of your chosen church and speak with them about your choice to convert. Attend classes or group meetings designed for potential converts, common at most parishes. Speak with the Priest or Deacon about why you want to convert to ensure you are sincere and committed.
Step 3Initiate the RCIA process at your chosen Parish once you have committed yourself to conversion. There are four main periods during the process�Pre-Catechumenate, The Catechumenate, Purification and Enlightenment and Mystagogy. The amount of time spent in each period is not set; rather, it depends on individual needs and feelings.
Step 4Become Confirmed and participate in the Sacrament of the Eucharist during the Easter Vigil (also be Baptized if not already). At this time you become a Neophyte and full member of the Roman Catholic Church.
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