A fixed function engine and method are described for processing a set of primitive commands. The body includes a sole positioned at a bottom portion of the golf club head, a crown positioned at a top portion, and a skirt positioned around a periphery between the sole and crown. The first and second interface surfaces are initially non-conforming along the interface. Further, metadata regarding the digital asset can be captured at any time to provide an audit trail for the digital asset from development all the way through deployment. The registration of the restriction code prohibits operation of the accessory.