Can. 658 In addition to the conditions mentioned in can. 656, nn. 3, 4, and 5 and others imposed by proper law, the following are required for the validity of perpetual profession:
1ΒΊ the completion of at least twenty-one years of age;
2ΒΊ previous temporary profession of at least three years, without prejudice to the prescript of can. 657 Β§3.