Whether observance is a special virtue, distinct from other virtues?

Objections

Objection 1 : It seems that observance is not a special virtue, distinct from other virtues. For virtues are distinguished by their objects. But the object of observance is not distinct from the object of piety: for Tully says (De Invent. Rhet. ii) that "it is by observance that we pay worship and honor to those who excel in some kind of dignity." But worship and honor are paid also by piety to our parents, who excel in dignity. Therefore observance is not a distinct virtue from piety.
Objection 2 : Further, just as honor and worship are due to those that are in a position of dignity, so also are they due to those who excel in science and virtue. But there is no special virtue whereby we pay honor and worship to those who excel in science and virtue. Therefore observance, whereby we pay worship and honor to those who excel in dignity, is not a special virtue distinct from other virtues.
Objection 3 : Further, we have many duties towards those who are in a position of dignity, the fulfilment of which is required by law, according to Rm. 13:7, "Render . . . to all men their dues: tribute to whom tribute is due," etc. Now the fulfilment of the requirements of the law belongs to legal justice, or even to special justice. Therefore observance is not by itself a special virtue distinct from other virtues.