It's mentioned in the latest amended S-1/A filing on EDGAR, 10-8-19. Along with a description of the latest shares and warrants to be issued in order to raise $6 mil.
The Class C Warrants will be exercisable beginning on the date our stockholders approve either an increase in the number of our authorized shares of common stock or a reverse stock split, in either case in an amount sufficient to permit the exercise in full of the Class C Warrants, and will expire on the fifth anniversary of the original issuance date.