FRIC — front-and-rear interconnected suspension

Hydraulically interconnecting front and rear suspension so the car held a near-constant aerodynamic platform through braking, acceleration and cornering.

Suspension is not bodywork, so the immobility clause did not obviously apply — but suspension is what controls the aero platform.

Aerodynamic consistency, worth most to the cars with the most downforce to protect.

Two stages. An unpublished technical directive made FRIC illegal from the German GP on 20 July 2014, and the 2015 Technical Regulations then formalised it.

A text-only harvest dates this a season late, because the mechanism that actually banned it mid-2014 was never published. The case is the reason this register carries a mechanism field at all.