Rental agreement - can i add this clause

Yes.It could be added with the consent of the lessee.But this itself is not a bar for legal action.

Your rental deed should not contain clauses which are arbitrary and should be over and above the legal position.  If the clauses in rental deed are arbitrary, the rental law will prevails.  According to law the tenant must be evicted with due course of law.  Even if you take in writing with him that he will evict the premises by his own will, the rental law will prevail and the tenant has liberty to file a case against the owner not to evict him.

sir,

is there any website where i can find local tenant law for the state of TAMILNADU ?

@newcomer123:  You may search in google for

THE TAMIL NADU BUILDING (LEASE & RENT CONTROL) ACT, 1960:

You will get the desired information once you have visited the above provisions of law.

@need justice:   The intended agreement can be made between you both, however, as rightly observed by some people, while implementation of this, the local rent control law will prevail and the arbitral phrases will not have any legal effect or can provide you the desired relief.

Thanks. I checked for the below and founds this in  wiki...

Provisions -

    Annual rent can be 10 per cent of total cost of the house at the time construction.
    Maintenance charges can be 10 per cent of the rent.
    Tenant also needs to pay the owner for property tax.
    Additional 15% rent for a furnished house.

So,is the above still applicable..thought the owner has to bear the property tax..