I'm preparing a progress payment request and I'm required to submit a conditional waiver and release document. This is the impetus for my query
No specific waiver and release document is mandated by law in Maryland, although your contract might have a specific form attached and incorporated as an exhibit. Of course, be careful you are not waiving claims for extra, changed or additional work (ie, a pending change order that has not been approved yet), retainage, any pending claims submitted, and work performed since the last billing period which the waiver relates to. Many "conditional" waivers will actually be final wiavers up to the date of the waiver, because the waiver releases all claims through the date of the release.
Good luck!