Institutio generalis Missalis Romani

In the sacristy, the sacred vestments (cf. nos. 337-341) for the priest, the deacon, and other ministers are to be prepared according to the various forms of celebration: For the priest: the alb, the stole, and the chasuble; For the deacon: the alb, the stole, and the dalmatic; the dalmatic may be omitted, however, either out of necessity or on account of a lesser degree of solemnity; For the other ministers: albs or other lawfully approved attire.^{96Cf. Interdicasterial Instruction on certain questions regarding the collaboration of the non-ordained faithful in the sacred ministry of priests, Ecclesiae de mysterio, 15 August 1997, art. 6: AAS 89 (1997), p. 869.} All who wear an alb should use a cincture and an amice unless, due to the form of the alb, they are not needed. When there is an Entrance Procession, the following are also to be prepared: the Book of the Gospels; on Sundays and festive days, the thurible and the boat with incense, if incense is used; the cross to be carried in procession; and candlesticks with lighted candles.