ABIM recertification for specialists necessary?

What is the general consensus on recertification for the internal medicine ABIM for specialists (e.g. cardiology) or even sub-specialists? I couldn't find much information on this from the ABIM website nor from other forums. People were saying that it is not necessary but couldn't confirm this. Obviously I would re-certify for cardiology but for IM, I would not go through the MOC or LKA if I didn't need to.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Internal Medicine and IM Subspecialties Source Type: forums