Like everything... depends!
Regionals or Nationals?
WHRRI annual tech is in a WHRRI logbook - which, like a WHRRI license, can be used to run SCCA Regionals.
However, if you wish to run Nationals, you'll need an SCCA National race license, SCCA logbook, and SCCA annual tech in that logbook. Good news is, talk to Larry at Tech, he can hook you up with one if needed.