You may have products, where some requirements ProductIP includes in the requirements list are never applicable or you always fulfill with a standard note or document.
You can automatically set requirements to 'not applicable' or fulfill them with a note or a document when you create a new file.
Any requirement fulfillment you define, will be applied to new files you create.
And in existing files, if you change the market release date, region or product category, the requirement fulfillments are applied as well.
The requirement fulfillments are only applied to requirements which have not been set to 'not applicable' or 'fulfilled' and have no notes and documents linked to them.