A dual pistonpoppet valve in a fuel dispenser works with a two-stage valve to help eliminate errors from an inferential flow meter. To this end, a recording apparatus according to the present invention includes a connector holding portion for supporting a card edge substrate to be mounted and dismounted with respect to a card edge connector through an elastic member so that the card edge substrate can be moved in two directions perpendicular to mounting and dismounting directions thereof. In response to determining that the client device complies with the access control policy, at least a portion of the data items that the access control policy permits the client device to access are identified.