Article 86 of Constitution of India "Right of President to address and send messages to Houses"
(1) The President may address either House of Parliament
or both Houses assembled together, and for that purpose
require the attendance of members.
(2) The President may send messages to either House of
Parliament, whether with respect to a Bill then pending in
Parliament or otherwise, and a House to which any message is
so sent shall with all convenient dispatch consider any
matter required by the message to be taken into
consideration.
Article 87 of Constitution of India "Special address by the President"
(1) At the commencement of the first session after each
general election to the House of the People and at the
commencement of the first session of each year the President
shall address both Houses of Parliament assembled together
and inform Parliament of the causes of its summons.
(2) Provision shall be made by rules regulating the
procedure of either House for the allotment of time for
discussion of the matters referred to in such address.