There is an ongoing dispute about the use of copyrighted materials with CST, who claim to be the copyright owners of all of R. Hubbard's writings. CST is a corporation with a P.O. box address in California. We have chosen not to challenge this claim unprovoked and have therefore chosen not to use his works except for fair use quotes. We have however left the procedures, ideas, processes and methods of operation and principles unchanged as defined by R. Hubbard. As per the above quote of US copyright law, these can not be copyrighted (apparently to protect society and the culture against knowledge monopolies). We have chosen to follow R. Hubbard's system, not because it is necessary the most optimum procedures, but because it the most thoroughly tested system of processes to achieve the goal of Clear. 
Other procedures and processes have been developed to archive the same goal (but based on the same basic principles and axioms). They may or may not work faster or better. We have chosen to stay 100% with the proven path. We originally called it Hubbard Streamlined Technology, because it followed R. Hubbard's  extensive research notes (HCOB's) closely, but was more streamlined as far as the communication was concerned.

Hubbard™ and L. Ron Hubbard™ are however trademarked property of CST - whatever that means. To Clearbird it means, we use R. Hubbard (not trademarked) to describe the person that primarily defined and developed the technology and we call the technology for Standard Clearing Technology or ST for short. To call it SCT could mix it up with CST so ST is our designated abbreviation.

Besides fair use quotes and processes/procedures from R. Hubbard's work we have especially used excerpts (with permission) from Geoffrey Filbert's Book Excalibur Revisited, which is free on the web and can be downloaded in it's totality here. (we recommend the html (frame) version). He copyrighted his work in 1982. This was after the dissolvement of HASI, the membership organization set up by R. Hubbard. HASI was the copyright owner of R. Hubbard's works up to May 10, 1977. (HASI was set up as a membership organization to protect the ethical use and dissemination of the technology and keep it free of special interest groups' control.)  After 1977 the work (written prior to this date) was in public domain until around 1984 where edited and altered versions got copyrighted by CST. But apparently the original technical writings and taped lectures are in the public domain. Legally, Filbert has clear copyright to the content of his book. It by the way includes the processes, axioms and definitions - which of course cannot be copyrighted according to the law. His registration is:

1. Registration Number: TX-894-990 Title: Excalibur revisited : the Akashic book of truth / [Geoffrey C. Filbert] Description: 792 p. Claimant: Geoffrey C. Filbert Name in © Notice: notice: Geoffrey C. Filbert & Akashic Applications of Scientology Created: 1982 Published: 2Feb82 Registered: 26Apr82.

Also we have used fair use quotes from "Study Basics", that we recommend in its totality. It is available here for download.

We have also used excerpt from L. Kin's Books (Axioms, Chapter on ARC, Meter Basics, Assists) available from the publisher and his distributors.

We have also used fair use quotes from the Pilot's works (Int Remedy). They are available for free on the web here.

In case the CST corporation or their affiliates RTC or OSA corporations want to challenge our legal rights to publish a new, user-friendly manual on these 20 years plus old programs, processes, procedures and technologies they can take it to court. We will have our counsel insist upon that all of the ST Users Manuals and all of R. Hubbard's original works are put into evidence and made part of the public record in a way the courts understand for sure. We have no ambitions of making any money from these manuals. We simply want to see the fulfillment of the original purposes of HASI: Ensure the actual ethical use of these 20 years plus old technologies and keep them free from vested interests.

The Editors.