Documents review criteria

Answer: ISO 27001 does not prescribe which criteria to use to define conditions for document review, so you can use only the review "if necessary" conditions. However, it is a good practice to define a time frame, so you can ensure that documents are reviewed before events that have a time frame defined (e.g., you have to define a time frame for the management review and this review has inputs that can lead to the need of documentation review).

This material will also help you regarding document management:
- Managing ISO Documentation: A Plain English Guide https://advisera.com/books/managing-iso-documentation-plain-english-guide/