Oracle Projects allows you to specify when the various project options take effect using effective dates. For example, leave the Effective To field blank to specify that the option is effective indefinitely. Instead of deleting an option, disable it by changing the effective dates, so you can maintain the audit trail.

The default effective start date of the option is the start date of the project. If the project start date is blank, the default effective start date of the option is the system date. The same applies to task start dates and task level option effective start dates.