Whether a man who is in sin can without sin exercise the Order he has received? [*Cf. TP, Question [64], Article [6]]

Objections

Objection 1 : It would seem that one who is in sin can without sin exercise the order he has received. For since, by virtue of his office, he is bound to exercise his order, he sins if he fails to do so. If therefore he sins by exercising it, he cannot avoid sin: which is inadmissible.
Objection 2 : Further, a dispensation is a relaxation of the law. Therefore although by rights it would be unlawful for him to exercise the order he has received, it would be lawful for him to do so by dispensation.
Objection 3 : Further, whoever co-operates with another in a mortal sin, sins mortally. If therefore a sinner sins mortally by exercising his order, he who receives or demands any Divine thing from him also sins mortally: and this seems absurd.
Objection 4 : Further, if he sins by exercising his order, it follows that every act of his order that he performs is a mortal sin; and consequently since many acts concur in the one exercise of his order, it would seem that he commits many mortal sins: which seems very hard.