The contract cannot waive the landlord's implied warranty of habitability in a rental property in California.
Here is more info: http://www.dca.ca.gov/publications/landlordbook/catenant.pdf
"An authoritative reference book suggests
two additional ways in which the implied
warranty of habitability may be violated. the
irst is the presence of mold conditions in
the rental unit that affect the livability of the
unit or the health and safety of tenants. the
second follows from a new law that imposes
obligations on a property owner who is notified
by a local health oficer that the property is
contaminated by methamphetamine. (see page
23.) this reference book suggests that a tenant
who is damaged by this kind of documented
contamination may be able to claim a breach of
the implied warranty of habitability."
