It’s the same standard as for all your HCP assets. Yes, HCP license works. I’ll warn you that some clients have reported that an HCP number pattern does not work. Inevitably, once they’ve considered all HCP types, just about any combination of numbers will gain entry. Since hearing about this, I’ve recommended against that. You could also have entry into the site managed by a third party that validates the person to be an HCP. Note that the HCP should not be granted temporary access to the site while verification is occurring.