Canon 119. In regard to collegial acts, unless the law or the statutes provide otherwise:

1° in regard to elections, provided a majority of those who must be summoned are present, what is decided by an absolute majority of those present has the force of law. If there have been two inconclusive scrutinies, a vote is to be taken between the two candidates with the greatest number of votes or, if there are more than two, between the two senior by age. After a third inconclusive scrutiny, that person is deemed elected who is senior by age;
[NB see Authentic Interpretation of canon 119 1º, 28.VI.1990]

2° in regard to other matters, provided a majority of those who must be summoned are present, what is decided by an absolute majority of those present has the force of law. If the votes are equal after two scrutinies, the person presiding can break the tie with a casting vote;

3° that which affects all as individuals must be approved by all.

Ad actus collegiales quod attinet, nisi iure vel statutis aliud caveatur:

1° si agatur de electionibus, id vim habet iuris, quod, praesente quidem maiore parte eorum qui convocari debent, placuerit parti absolute maiori eorum qui sunt praesentes; post duo inefficacia scrutinia, suffragatio fiat super duobus candidatis qui maiorem suffragiorum partem obtinuerint, vel, si sunt plures, super duobus aetate senioribus; post tertium scrutinium, si paritas maneat, ille electus habeatur qui senior sit aetate;

2° si agatur de aliis negotiis, id vim habet iuris, quod, praesente quidem maiore parte eorum qui convocari debent, placuerit parti absolute maiori eorum qui sunt praesentes; quod si post duo scrutinia suffragia aequalia fuerint, praeses suo voto paritatem dirimere potest;

3° quod autem omnes uti singulos tangit, ab omnibus approbari debet.