Transfer of property from mother to son

She can make a will deed. She can make a gift deed. Any one of these two. In the former case, the will deed will come into operation after her death and till then she can change the terms of the will as many times as possible. If she makes a gift deed, then she cannot modify the terms once the deed is registered and after registration the sons cannot claim right in the property given to other son. 

MUMBAI PROPERTY TO SON NO 1

1)mumbai property (which was purchased by her husband , The property is landlord ship and not owner ship) transfer to son leaving with her .  ie son no 1

if mother is landlord then she can trf by will or gift to her son .
but if she is tenant then she cannot trf the flat to her son.only landlord can trrf the flat in her son name.
According to Maharashtra Rent Control Act.:-, upon demises of any tenant, the tenancy right will devolve upon the person who was residing with the deceased tenant as his family member at the time of his death.

rentent  property cannot be trf by will of tenant.

if the property is self purchased  then no NOC from anyone is needed otherwise NOC from other hier is needed.

"""can she change the decision once the deed is executed"""

in Will she can change her decision anytime and her LAST WILL will pervail .
 

thank you  sir 

means a gift deed is far more reliable and 

can i make it a gift deed cum power of attorny in the favourable person  accepting the  gift deed sohe can change the name and details at the conserned athourity

yes the property is landlordship and the mother is tenant in that property

but the rajasthan property is ownership  we do not have any documents  related to that property except the light bill and water bill

so how can i transfer the rajasthan property to son no 2.

 mother is tenant, then she cannot gift or write will of such property,

for rajasthan property make a appplication to municipal for getting 7/12 copy