Clarification for suspension changes in ST2

[mossaidis]

NASA Honda Challenge:
i) Camber adjustment devices (plates/shims/eccentric, etc.) are unrestricted but are limited to one
per wheel. Front and rear upper control arms may be modified or replaced with items that allow
camber and/or caster adjustment only
j) Independent rear suspension mounting holes may be slotted or reinforced for camber and/or toe
adjustment.

SCCA IT:
d. Suspension Mounting Points
1. Cars equipped with MacPherson strut suspension may decamber wheels by the use of eccentric bushings at control arm pivot points, by the use of eccentric bushings at the strut-to-bearing-carrier joint, and/or by use of slotted adjusting plates at the top mounting point. If slotted plates are used, they shall be located on existing chassis structure and may not serve as a reinforcement for that structure. Material may be added or removed from the top of the strut tower to facilitate installation of adjuster plate.
2. On other forms of suspension, camber adjustment may be achieved by the use of shims and/or eccentric bushings.
3. All forms of suspension may adjust caster by means of shims or eccentric bushings. Additionally, MacPherson strut-equipped cars may adjust caster at the upper strut mounting point/plate.
4. Independent rear suspension mounting holes may be slotted and reinforced for purposes of camber and/or toe adjustment. Material may be removed from the top of the strut tower to facilitate installation of adjuster plate

SCCA SOLO ST class:
Camber kits, also known as camber compensators, may be installed.
These kits consist of either adjustable length arms or arm
mounts that provide a lateral adjustment to the effective length of
a control arm. Alignment outside the factory specifications is
allowed. The following restrictions apply:
1. On double/unequal arm (e.g. wishbone, multi-link) suspensions,
only the upper arms OR lower arms may be modified or
replaced, but not both. Non-integral longitudinal arms that
primarily control fore/aft wheel movement (e.g. trailing arm(s)
or link(s) of a multi-link suspension) may not be replaced,
changed, or modified.
2. On arm-and-strut (MacPherson/Chapman) suspensions, the
lower arms may be modified/replaced OR other methods of
camber adjustment as allowed by paragraphs 14.8.B, C, or G
may be used, but not both.
3. On swing or trailing arm suspensions, the main arms may not
be modified or replaced, but lateral locating links/arms may be
modified or replaced.
4. The replacement arms or mounts must attach to the original
standard mounting points. All bushings must meet the requirements
of 14.8.B. Intermediate mounting points (e.g. shock/
spring mounts) may not be moved or relocated on the arm,
except as incidental to the camber adjustment. The knuckle/
bearing housing/spindle assembly cannot be modified or replaced.

Comscc ST:
G. Camber/caster plates or eccentric bushings/bearings for the
purpose of adjusting camber/caster are allowed provided that the stock
suspension mounting points are retained and not modified. No
modifications to the stock strut towers are allowed.