I don't know if anyone here reads Auto Action but an article on TEGAs proposed changes for the V8 Supercars was in AA a few weeks ago and since it hasn't been mentioned here I might quickly mention some of it for those who may not have read it.
From 2005: No front undertrays, fixed or minimal adjustment on rear wing, control brake rotor, control brake pad, restricted list of calipers (control calipers from 2006), live car to pit telemetry banned, control dash unit, reduction in the duplication of data collected, reduction in the number of channels of data available, sequential/H-pattern gearbox changes to be taken into consideration, control spec of internal gearbox components, minimum flywheel weight, control carbon clutch, control crown wheel and pinion, minimum driveshaft weight, minimum tailshaft weight and specified gauge of metal, as many engine components as practical and possible will have a minimum weight and specification and be specified as a control component, maximum valve lift, specified number and size of piston rings, restricted list of shock absorbers (control sealed shock absorber from 2006), team homologated stub axle available for use and sample logged with TEGA (control component from 2006), control aluminium alloy wheel, as many non-performance parts as possible to be control parts, control fuel tank, identical location of fuel tank, control on board jacks, control rattle guns and associated equipment.
Minimum engine block weight from 2007.