The following fields have the allow edit box feature available: Project Classification, Project Type, Apply Cost of Money Rates, Account Group, Owning Org, and Project Workforce Required.  

When you select a value for these fields at the top level of the project, you can use the Allow Edit checkbox and to create one of the following options:

• Leave the Allow Edit checkbox cleared and the value selected for the field at the top level defaults to all lower levels of the project a non-editable field.
• Select the Allow Edit checkbox at the top level, the value still defaults, but the field is editable at the lower levels.
• Leave the Allow Edit checkbox cleared at any level of the project, and all levels below the level where it was unselected are non-editable.

This feature provides a level of control over selection of key fields at lower levels of the project tree.