Description: The clockIdentity is an 8 octet array formed by mapping an IEEE EUI-48 assigned to the time-aware system to IEEE EUI-64 format (i.e., to an array of 8 octets). The EUI-48 shall be an Ethernet MAC address owned by the organization creating the instance of a clockIdentity under the terms of this subclause. The organization owning the MAC address shall ensure that the MAC address is used in generating only a single instance of a clockIdentity, for example by requiring that the MAC address be a MAC address embedded in the device identified by the clockIdentity. The mapping rules for constructing the EUI-64 from the EUI-48 shall be those specified by the IEEE [B2]. The 8 octets of the created IEEE EUI-64 shall be assigned in order to the 8 octet array clockIdentity with most significant octet of the IEEE EUI-64 assigned to the clockIdentity octet array member with index 0.(see 8.5.2.2).