回复：It is actually normal

是的，感觉像不平等条约，lease的原话是这样的:

Owner agrees that Tenant may, peacefully and quietly, enter the Premises at the beginning of the Term and that the Premises will be made available in a condition permitting reasonably safe habitation, except if premises are not vacated by previous tenant in which case tenant may terminate lease or wait for a period not more than 90 days to commence this Lease. If prior tenant has not vacated the premises by such time, this Lease shall be deemed null and void and no damages shall be due by either party to the other.