Time limit for landlord to sign a renewal lease agreement?

[Maxwell Lee]

Hey all,

quick question on renewing a lease agreement with a tenant. 
From a legal perspective (in California), if the tenant has signed the lease agreement, is there a statute of limitation on how long the landlord has to sign the lease to finalize the agreement.  30 days? 60 days?  If not signed by a certain amount of time gone by, does the lease agreement go null/void?

thanks