This utility will assist you in importing new values presented in NEMSIS v3 into your codetables. This will not map existing custom values to NEMSIS v3.
You are not required to import values, only the ones you feel you need, if not already utilized in your code tables. However, if you import, you must map to NEMSIS v2 if your state sends v2 data.
If you have an existing custom value that matches a NEMSIS v3 value or a custom value is already mapped to NEMSIS v3, there is no need to import that new value.
In summary, this utility will show what you already have mapped to v3 for certain tables and allow you to import the new values. However, you must ensure all existing values are mapped to V3 and possibly V2.