How do I create a Massachusetts Partial Unconditional Lien Waiver

We are a GC with an owner who is requesting Partial Conditional AND Partial Unconditional Lien Waivers for each payment app. Massachusetts has a statutory lien waiver form "Partial Waiver and Subordination of Lien". But the language of the form, particularly the most important part "upon receipt of", reads like a conditional lien waiver. I don't understand how we are supposed to make a Massachusetts partial unconditional lien waiver.