Rules on level addressing

The number and size of levels that you define in the activity group determine the format of activity level addresses. For example, if you defined three levels and set a size of three to each level, then you can set the level address for one of your first level activities as 001-000-000. If you have four levels, each with a size of four, then you can set one of your first level activities as 0001-0000-0000-0000.

Use a unique level address for each activity within the activity group. This allows you to re-use the same level addresses for similar activities in different activity groups.