addendum to rental contract

[Jon L.]

in addition to my rental contract, can I include an addendum that lists a whole bunch of items such as the following: -by signing this lease, you acknowledge that carbon monoxide and smoke alarms are installed in your unit. -$100 will be charged/deducted from your security deposit if damaged or removed -cars must be registered and in operable condition. cars may not be used for storage. management reserves the right to tow any cars not in compliance -management will pay for drain clearance once per year. tenants are responsible for any other clogs. management reserves the right to deduct this from the security deposit -if the unit is part of HUD(section 8) and the unit fails inspection for sanitary reasons, management reserves the right to hire a professional cleaner and deduct $200 from the security deposit. I just quickly came up w a few items and was wondering if it's easily allowed to be part of an "addendum to the rental agreement". do I need a lawyer to type it up or would that work? I'm in Orange county, California