519 Time Period Qualifier
Code identifying the type of time period
- Type
 - Identifier (ID)
 - Length
 - Min 1 / Max 1
 - Codes
 | Code | Description | 
|---|
|  1 | Month | 
|  2 | Year | 
|  A | Hourly Appurtenance Units (Hours of Enhancement/Addition to Equipment) | 
|  D | Daily Time Units | 
|  H | Hourly Time Units | 
|  O | Other Time Units |