License Agreement Dangers

Hi guys, we have sold a townhouse off the plan. The buyers are keen to move in early, meaning before subdivision and settlement. My builder mentioned once the Occupancy Permit is approved, they can move in which should be approx 4-5 weeks from now. Stupid me promised them it’s fine as our builder delayed the project for a long time.

Obviously License Agreement and insurance will be organized if they want to move in early. I was just thinking of the dangers of doing this as they are incredibly fussy people.

Any dangers that I should be aware of? My solicitor is not exactly helpful and looked as confused as me. Thanks