Barbershop Harmony Society webpage, (resources), document center
http://www.barbershop.org/resources/document-center/
General Chapter Business Documents - most of what you want is under here
http://www.barbershop.org/resources/document-center/business-and-finance/#csd
Chapter Secretary (training manuals)
http://www.barbershop.org/resources/document-center/business-and-finance/#csd
Membership Documents
http://www.barbershop.org/joining-the-barbershop-harmony-society/membership-documents/
Show Clearance and Legal (yes, two sections, apparently)
http://www.barbershop.org/resources/document-center/copyright-and-legal/
http://www.barbershop.org/resources/document-center/business-and-finance/#scal