In the case of a mixed patronage, the rights of which are exercised in common by an ecclesiastical and a lay patron, the same rule holds as in the case of a lay patronage. Here it is the rule to deal with the mixed patronage, now as a spiritual and again as a lay patronage, according as it is most pleasing to the patrons. If the prerogatives of the mixed patronage are exercised in turn, however, it is considered as a spiritual or a lay patronage, as suits the nature of the case.