2.1 Transport
The two vendor-specific information elements in the Network Cost Transfer Protocol are transmitted as part of IEEE802.11 Beacons or Probe Responses. There are no requirements for the order of the information elements and it is not necessary that both be used at the same time.
The format of information elements is specified in [IEEE802.11-2007] section 7.3.2. The format and processing of Beacon or Probe Response frames are also specified in [IEEE802.11-2007].