quota system
noun[C]
COMMERCEukusamethodof setting alimiton how much of something acountryorcompanyisallowedto have,produce,import, etc.:
Theproposedchangein thequotasystemwouldaddmillions ofbarrelsofoilto theworldmarket.
The end of thequotasystemwillallowcountriestosellas muchclothingas theywantaround theworld.