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Not true, they have the same Canon law in Italy, it's not like there are national Catholic Churches, like in Orthodoxy. I am quoting directly the Vatican. You need to ask for permission to marry a non-Catholic Christian, but it's totally possible. You don't need to convert and the marriage is valid.
Here are instructions on mixed marriages with non-Catholic Christians, by the Sacred Congregation for the Doctrine of the Faith: https://www.vatican.va/roman_curia/c...-misti_en.html
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