18.104.22.168 Adoration, Exposition and Benediction
1. Solemn Exposition of the Blessed Sacrament is to be held at least once a year in all churches and oratories where the Blessed Sacrament is reserved. 
2. Worship of the Eucharist outside of Mass is to be conducted according to the approved liturgical books  and the norms contained in Guidelines for Adoration and Exposition of the Blessed Sacrament, Diocese of Lansing.
 c. 942.
 See particularly Roman Ritual: Holy Communion and Worship of the Eucharist Outside of Mass, Sacred Congregation for Divine Worship (1973 and with revisions). Chapter III treats Exposition, Benediction, Processions and Eucharistic Congresses.