Is an ISAN required for audiovisual works ?
No. The ISAN is a voluntary numbering system. There is no requirement to adopt or implement ISAN for audiovisual works. Members of the audiovisual community will implement ISAN by choice, not obligation. The ISAN is an industry-driven numbering system. It is a tool to facilitate business, by the industry and for the industry. The efficiency and precision that the ISAN provides for identifying audiovisual works makes the ISAN a logical business decision — but it isn’t a mandatory one.
