Answer:
It is an example of an import quota
Explanation:
An import quota is a ceiling on the physical or monetary amount of a product that a firm can import.
In this question, only a few firms can import cheese, and each firm has a ceiling on the amount of cheese they can import per year. The limit is expressed in physical terms (pounds of cheese). The logic behind import quotas is protect local industries, however, they oftern result either in shortages or in higher prices for consumers.