The Notice Period drop-down values can be found under Availability in the list of values. To add/edit/remove these:
Log in to Access RDB as a User with Administrator privileges.
From the Ribbon, click Options and then click Look-Ups.
Click List of Values and then select Availability.
To add a new value click New Value, to edit a Value select it.
Fill in the Value and Description.
Click Save.
To remove a value, select it and click Delete.