A quota applied as a result of a default quota, rather than an explicit entry in the quotas file, is referred to as a derived quota.
Data ONTAP derives the quota information from the default quota entry in the quotas file and applies it if a write request affects the disk space or number of files used by an instance of the quota target. Derived quotas are applied for all quota targets (users, groups, and qtrees) unless an explicit quota is in effect for that target.