Attention. You cannot delete unit of measurement values.
Details a unit of measurement for a period of study. For each unit of measurement, you can add and edit the following information:
Code
Unique value, such as 1, that must not exceed the maximum length of the corresponding field in an integrated system, such as a student management system.
After saving, the value cannot be edited.
Description 
Description that is used to select the unit of measurement, such as Years.
The description can be translated.
In use
If selected, the entity or field can have the value. If cleared after the value has been selected for the entity or field, the entity or field keeps the value. However, the value is no longer available for selection.
Regulatory agency code
Code that defines the unit of measurement for reporting purposes, such as 1.