The FCC has released a public notice with proposed application and bidding procedures for the auction of millimeter wave spectrum in the Upper 37 GHz, 39 GHz, and 47 GHz bands for 5G (Auction 103). Among other things, Auction 103 would offer 100 megahertz blocks on a Partial Economic Area (PEA) basis, divided into a clock phase for generic blocks and an assignment phase for certain channel assignments. Comments on the Auction 103 public notice are due by May 15, 2019 and reply comments by May 30, 2019.