Vatican Website: Chapter IV - Section IV: Sacred Vestments 336. The sacred garment common to ordained and instituted ministers of any rank is the alb, to be tied at the waist with a cincture unless it is made so as to fit even without such. Before the alb is put on, should this not completely cover the ordinary clothing at the neck, an amice should be put on. The alb may not be replaced by a surplice, not even over a cassock, on occasions when a chasuble or dalmatic is to be worn or when, according to the norms, only a stole is worn without a chasuble or dalmatic.
337. The vestment proper to the priest celebrant at mass and other sacred actions directly connected with mass is, unless otherwise indicated, the chasuble, worn over the alb and stole.
338.
The vestment proper to the deacon is the dalmatic, worn over the alb and stole.
The dalmatic may, however, be omitted out of necessity or on account of a lesser degree of solemnity.
339. In the dioceses of the united states of america, acolytes, altar servers, lectors, and other lay ministers may wear the alb or other suitable vesture or other appropriate and dignified clothing
340. The stole is worn by the priest around his neck and hanging down in front. It is worn by the deacon over his left shoulder and drawn diagonally across the chest to the right side, where it is fastened.
341. The cope is worn by the priest in processions and other sacred actions, in keeping with the rubrics proper to each rite.
342. Regarding the design of sacred vestments, conferences of
bishops **may determine **and propose to the apostolic
see adaptations that correspond to the
needs and the usages of their regions.