Scientology contribute a proportion of their income and comply with the Religious Technology Center (RTC) and its standards. Operating Thetan levels are offered only at Scientology's Advanced Organizations (Los Angeles, Sydney, East Grinstead and Copenhagen). The Flag Service Organization in Clearwater, Florida offers OT levels VI and VII. The Scientology ship "Freewinds" offers OT VIII. In 1955, Hubbard created a list of 63 celebrities targeted for conversion to Scientology. In a church policy letter in 1973, L. Ron Hubbard wrote, "The purpose of [the] Celebrity Centre is, to forward the expansion and popularization of Scientology through the arts." Scientology operates eight
Scientology in Germany by a large number of independent associations or "Vereine" in Germany; their umbrella organisation is the "Scientology Kirche Deutschland e.V." Germany's domestic intelligence service, the "Bundesamt für Verfassungsschutz" ("BfV", or Federal Office for the Protection of the Constitution), estimates that there are 4,000 Scientologists in Germany, down from earlier estimates of 5,000 to 6,000. The Church of Scientology reported around 30,000 members from the mid-1990s onwards; this number remained stable for many years. However more recently Scientology has said it has only 12,000 members. Discrepancies in Scientology membership numbers arise because the Church of Scientology applies more inclusive criteria in