+---------------+
                                            | AVP Flag rules|
                                            |----+-----+----|
                     AVP  Section           |    |     |MUST|
   Attribute Name    Code Defined Data Type |MUST| MAY |NOT |
   -----------------------------------------|----+-----+----|
   CC-Correlation-Id 411  8.1    OctetString|    |  M  |  V |
   CC-Input-Octets   412  8.24   Unsigned64 | M  |     |  V |
   CC-Money          413  8.22   Grouped    | M  |     |  V |
   CC-Output-Octets  414  8.25   Unsigned64 | M  |     |  V |
   CC-Request-Number 415  8.2    Unsigned32 | M  |     |  V |
   CC-Request-Type   416  8.3    Enumerated | M  |     |  V |
   CC-Service-       417  8.26   Unsigned64 | M  |     |  V |
     Specific-Units                         |    |     |    |
   CC-Session-       418  8.4    Enumerated | M  |     |  V |
     Failover                               |    |     |    |
   CC-Sub-Session-Id 419  8.5    Unsigned64 | M  |     |  V |
   CC-Time           420  8.21   Unsigned32 | M  |     |  V |
   CC-Total-Octets   421  8.23   Unsigned64 | M  |     |  V |
   CC-Unit-Type      454  8.32   Enumerated | M  |     |  V |
   Check-Balance-    422  8.6    Enumerated | M  |     |  V |
     Result                                 |    |     |    |
   Cost-Information  423  8.7    Grouped    | M  |     |  V |
   Cost-Unit         424  8.12   UTF8String | M  |     |  V |
   Credit-Control    426  8.13   Enumerated | M  |     |  V |
   Credit-Control-   427  8.14   Enumerated | M  |     |  V |
     Failure-Handling                       |    |     |    |
   Currency-Code     425  8.11   Unsigned32 | M  |     |  V |
   Direct-Debiting-  428  8.15   Enumerated | M  |     |  V |
     Failure-Handling                       |    |     |    |
   Exponent          429  8.9    Integer32  | M  |     |  V |
   Final-Unit-Action 449  8.35   Enumerated | M  |     |  V |
   Final-Unit-       430  8.34   Grouped    | M  |     |  V |
     Indication                             |    |     |    |
   Granted-Service-  431  8.17   Grouped    | M  |     |  V |
     Unit                                   |    |     |    |
   G-S-U-Pool-       453  8.31   Unsigned32 | M  |     |  V |
     Identifier                             |    |     |    |
   G-S-U-Pool-       457  8.30   Grouped    | M  |     |  V |
     Reference                              |    |     |    |
   Multiple-Services 456  8.16   Grouped    | M  |     |  V |
    -Credit-Control                         |    |     |    |
   Multiple-Services 455  8.40   Enumerated | M  |     |  V |
    -Indicator                              |    |     |    |
   Rating-Group      432  8.29   Unsigned32 | M  |     |  V |
   Redirect-Address  433  8.38   Enumerated | M  |     |  V |
     -Type                                  |    |     |    |
   Redirect-Server   434  8.37   Grouped    | M  |     |  V |
   Redirect-Server   435  8.39   UTF8String | M  |     |  V |
     -Address                               |    |     |    |
   Requested-Action  436  8.41   Enumerated | M  |     |  V |
   Requested-Service 437  8.18   Grouped    | M  |     |  V |
     -Unit                                  |    |     |    |
   Restriction       438  8.36   IPFiltrRule| M  |     |  V |
     -Filter-Rule                           |    |     |    |
   Service-Context   461  8.42   UTF8String | M  |     |  V |
     -Id                                    |    |     |    |
   Service-          439  8.28   Unsigned32 | M  |     |  V |
     Identifier                             |    |     |    |
   Service-Parameter 440  8.43   Grouped    |    |  M  |  V |
     -Info                                  |    |     |    |
   Service-          441  8.44   Unsigned32 |    |  M  |  V |
     Parameter-Type                         |    |     |    |
   Service-          442  8.45   OctetString|    |  M  |  V |
     Parameter-Value                        |    |     |    |
   Subscription-Id   443  8.46   Grouped    | M  |     |  V |
   Subscription-Id   444  8.48   UTF8String | M  |     |  V |
     -Data                                  |    |     |    |
   Subscription-Id   450  8.47   Enumerated | M  |     |  V |
     -Type                                  |    |     |    |
   Tariff-Change     452  8.27   Enumerated | M  |     |  V |
     -Usage                                 |    |     |    |
   Tariff-Time       451  8.20   Time       | M  |     |  V |
     -Change                                |    |     |    |
   Unit-Value        445  8.8    Grouped    | M  |     |  V |
   Used-Service-Unit 446  8.19   Grouped    | M  |     |  V |
   User-Equipment    458  8.49   Grouped    |    |  M  |  V |
     -Info                                  |    |     |    |
   User-Equipment    459  8.50   Enumerated |    |  M  |  V |
     -Info-Type                             |    |     |    |
   User-Equipment    460  8.51   OctetString|    |  M  |  V |
     -Info-Value                            |    |     |    |
   Value-Digits      447  8.10   Integer64  | M  |  P  |  V |
   Validity-Time     448  8.33   Unsigned32 | M  |  P  |  V |