The United States Copyright Office charges a filing fee each time a new set of authors is added to a copyright registration. "Unique Author Combination" (UAC) is a term the Easy Song Team uses to help determine the number of filings needed and what fees are needed to be paid. It is the specific combination or group of authors contributing to a copyrighted work.
For example, if Jane wrote a Song #1 by herself and then Jane and John wrote Song #2 together, there would be two different Unique Author Combinations.
- Jane and John