Permission

Copyright FAQs - answers to common questions and misconceptions about copyright.
The copyright notices fact sheet explains how to mark your work to ensure the best effect and protection.
Music copyright; information and advice for song writers and composers.
How to obtain permission to use copyright materials. Who to contact, when to get permission, and how to apply.
Copyleft is a term that describes a copyright licencing scheme where the author surrenders some of his rights...
A derivative work is a work that is based on (derived from) another copyright work...
Is your use fair dealing? or covered under a licensing scheme? has copyright expired? or do you need permission from the copyright holder.