Letter to the Chorepiscopi (Subscribe)
Links
To the Chorepiscopi, that No Ordinations Should Be Made Contrary to the Canons
http://www.ccel.org/fathers2/NPNF2-14/Npnf2-14-191.htm
Letter 54, accepted as Basil's Canon 90 by the Synod in Trullo. Epitome. From the Nicene and Post-Nicene Fathers of the Christian Church, second series, vol. 14.
Letter 54
http://www.ccel.org/ccel/schaff/npnf208.ix.lv.html
To the Chorepiscopi. Complete. Blomfield Jackson translation, with notes. From the Nicene and Post-Nicene Fathers of the Christian Church, second series, vol. 8.