The Tapkey Mobile SDK is provided under a proprietary commercial license. It must not be used or redistributed, except with written consent of Tapkey. The Tapkey Mobile SDK must not be used other than intended and permitted by Tapkey. This implies that the Tapkey Mobile SDK may be used only to communicate with Tapkey-enabled devices under the ISO 7816 Application IDs, Bluetooth Service IDs, etc. as permitted by Tapkey by written consent.