Add the following to the rule entitled Corporate Defence:

As a daily action, a Hacker may, on behalf of their Corp Name, Investigate a Codename, provided that they are not currently carrying out another such Investigation.

In order to commence an Investigation, the Hacker must expend at least 1 from the Defence Score of their Corp Name, and must then make a Story Post whose title starts with the word “Investigation:”, and which specifies a single Codename, and the Hacker who they believe owns that Codename.

A Hacker may resolve an Investigation at any point, provided that it is not sooner than 25 hours minus 1 hour for each point of Defence Score spent to initiate that Investigation after it has been initially posted. To resolve an Investigation, the Hacker must comment to the Investigation Post to the effect that the Investigation is complete. They may then remove the Codename from the GNDT; any subroutines it had in its Tool or Secrets it had accumulated are lost.

Add the following as a subrule to the rule called Denizens, entitled Retirement:

At any time, a Hacker may chose to Retire a Codename that they control. Retired Codenames are signified in the GNDT by having the name of the Hacker who controlled them in the “Hacker” field. A Retired Codename is not considered to be a Codename for any other dynastic rule unless explicitly stated.