at other rites also, subject to the limitations described in the 
directions for each service. 

In any of the Proper Liturgies for Special Days, and in other services 
contained within this Book celebrated in the context of a Rite One 
service, the contemporary idiom may be conformed to traditional 
language. 

Hymns referred to in the rubrics of this Book are understood as those 
authorized by this Church.  The words of anthems are to be from
Holy Scripture, or from this Book, or from texts congruent with them. 

On occasion, and as appropriate, instrumental music may be substituted 
for a hymn or anthem. 

Where rubrics indicate that a part of a service is to be "said," it must 
be understood to include "or sung," and vice versa. 

When it is desired to use music composed for them, previously authorized 
liturgical texts may be used in place of the corresponding texts in this 
Book. 

Scriptural citations in this Book, except for the Psalms, follow the 
numeration of the Revised Standard Version of the Bible.