This policy setting specifies the default start date for new tasks as they are entered in the current project. For projects ...

This policy setting specifies the default start date for new tasks as they are entered in the current project.  For projects scheduled from the start date, the options are "Start on Project Start Date" and "Start on Current Date."  For projects scheduled from the finish date, the options are "Finish on Project Finish Date" and "Start on Current Date."If you enable or do not configure this policy setting, new tasks will start on the project start date.If you disable this policy setting, new tasks will not start on the project start date.