These webinars are mainly about the State Plane Coordinate System, but they include information about the foot definition and state legislation at the end.
Technical Contact: Dr. Michael Dennis, NOAA, National Geodetic Survey, michael.dennis [at] noaa.gov (michael[dot]dennis[at]noaa[dot]gov), (240) 533-9611
General Contact: Elizabeth Benham, elizabeth.benham [at] nist.gov (elizabeth[dot]benham[at]nist[dot]gov), (301) 975-3690