For many years Brother William Heidrick published the Thelema Lodge Calendar which, despite its humble title, functioned as a proper magazine brimming with OTO news, occult scholarship, ritual tech and even a Letters to the Editors column. In the February 1988 issue he published a detailed and delightfully colloquial discussion of the official lamen of the OTO which is posted as part of an extensive online archive.
http://www.billheidrick.com/tlc1988/tlc0288.htm#fob
