Section 8 California - How much notice is required to vacate?

[Sergey Tkachev]

I've been having a hard time finding a clear answer on this so maybe someone who knows Section 8 in California can help.  Let's say a Section 8 tenant has been living in a property for over a year (actually 3 years - they're past the initial 1 year lease period and no renewals have been made, so assuming it's now month-month).  If landlord want's to vacate the unit, how much notice is required - 60 days or 90 days?  Does it matter if it's for cause or without cause?  I'm getting conflicting information - it seems the 90-day rule applies to foreclosure situations and when there is a lease in effect but it's not clear if all other situations are 60-days.  Property in question is in Sacramento.