Of the Sacrament of Order As to Its Essence and Its Parts

In the next place we must consider the sacrament of Order: (1) Order in general; (2) the difference of Orders; (3) those who confer Orders; (4) the impediments to receiving Orders; (5) things connected with Orders.Concerning Order in general three points have to be considered: (1) Its essence, quiddity, and parts; (2) Its effect; (3) The recipients of Orders.Under the first head there are five points of inquiry:(1) Whether there should be Order in the Church?(2) Whether it is fittingly defined?(3) Whether it is a sacrament?(4) Whether its form is expressed properly?(5) Whether this sacrament has any matter?

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Whether there should be Order in the Church?
Whether Order is properly defined?
Whether Order is a sacrament?
Whether the form of this sacrament is suitably expressed?
Whether this sacrament has any matter?