1964-jan-25 Sacram Liturgiam (establishes Consilium)

http://www.vatican.va/holy_father/paul_vi/motu_proprio/documents/hf_p-vi_motu-proprio_19640125_sacram-liturgiam_en.html

1964-jan-25 Sacram Liturgiam
Apostolic Letter issued motu proprio
establishes the Consilium (with an S)
eventually (need date here) the following are appointed:
Cdl Giacomo Lercaro (president)
Rev Annibale Bugnini CM (secretary)

1969-may-08 Sacrum Rituum Congregatio
disolves the Consilium (with an S)

paragraph five:
... we are establishing a special commission whose principal task will be to implement in the best possible way the prescriptions of the Constitution on Sacred Liturgy itself.