24.

   However, the Brothers and Sisters are obliged to do the penances imposed on them by (their) Superiors, when these are required concerning something [super hoc].  Also they are obliged to the essential three vows:  to poverty, in accord with [iuxta] the terms of their own statutes; to chastity, by binding themselves to observe celibacy and in addition [insuper] by a new title, that is of this very vow, to abstain from whatever act, both external, as well as internal, opposed to chastity; to obedience, by assuming the obligation of obeying the mandate of a legitimate Superior according to [ad] the norm of their own Constitutions (cf. Rule op. cit., ch. X).