I suspect that is a bit of a tortured interpretation. The GCR defines suspension bushing as:

Suspension Bushing – A hollow cylindrical mounting component which
acts as a bearing, allowing constrained motion, between a suspension
component and attachment point.

The IT bushing language is:

Bushing material, including that used to mount a suspension
subframe to the chassis, is unrestricted. This includes
the use of spherical bearings, so long as no suspension
component is modified to facilitate their installation. Retention
of spherical bearings by use of tack welds is allowed,
as long as the welds serve no other purpose.

And that language is under "Suspension Mounting Points". Steering is not specifically mentioned or called out, but, steering as defined in the GCR is a bit weak and doesn't specifically cite the rack.