Is there some information missing here? e.g. does this question appear under a section relating to a specific plant species?
I ask because the germination standard varies across species. So, for example, it's 75% for most grasses but 80% or 85% for others. There are different figures for crops such as sugar beet and fodder beet:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/602853/seed-certification-technical-annex.pdf