The Code of Criminal Procedure, 1973 (CrPc)
50A. Obligation of person making arrest to inform about the arrest, etc. to a nominated person.
(1) Every police officer or other person making any under this Code shall forthwith give the information regarding such arrest and place where the arrested person is being held to any of his friends, relatives or such other persons as may as may be disclosed or nominated by the arrested person for the purpose of giving such information.
(2) The police officer shall inform the arrested person of his rights under sub-section (1) as soon as he is brought to the police station.
(3) An entry of teh fact as to who has been informed of the arrest of such person shall be made in a book to be kept in teh police station insuch form as may be prescribed in this behalf by the State Government.
(4) It shall be the duty of teh magistrate before whom such arrested person is produced to satisfy himself that the requirements of sub-section (2) and sub-section (3) have been complied within respect of such arrested person.
Cr PC Amendment Act 2005 (Notes on clauses)
Section 50A requires the police to give information about the arrest of the person as well as the place where he is being, held to any one who may be nominated by him for sending such information.