A more thorough explanation:

A requirement for restriction is a limitation or qualification placed on something. This can refer to:

1. A limitation on the use or enjoyment of property, often found in a deed as a restrictive covenant.
2. A military punishment that involves moral and legal restraint, rather than physical restraint. This is called a military restriction and is imposed by a commanding officer's nonjudicial punishment or by a court-martial.
3. A ruling made by a patent examiner that a patent application contains two or more distinct inventions. The applicant must then choose one invention to continue prosecuting under the original application by abandoning some of the original claims.

For example, a homeowner may have a restriction on their property that prevents them from building any structures taller than two stories. This is a limitation on the use of their property. In the military, a soldier who has broken a rule may be given a restriction, which means they are not allowed to leave the base or ship they are stationed on. This is a form of punishment that restricts their freedom. In the case of a patent application, a requirement for restriction may be issued if the application contains multiple inventions. The applicant must then choose which invention to pursue and abandon the others.