I just looked over my NACD instructor manual and they have come online with the other agencies recently. There is an additional page in the standards section that outlines the "Double Cylinders Intro Cave" level that expires in 1 year. To clarify other agencies' standards, the NSS-CDS Basic Cave expires 18 months after issuance but may be reissued by the original instructor. The IANTD Intro Cave Doubles card never expires.
And you're right, there is an Instructor Director position with the NACD. My apologies.
And you're right, there is an Instructor Director position with the NACD. My apologies.