(1) No person who is arrested shall be detained in custody without being informed, as soon as may be, of the grounds for such arrest nor shall he be denied the right to consult, and to be defended by, a legal practitioner of his choice.

(2) Every person who is arrested and detained in custody shall be produced before the nearest magistrate within a period of twenty-four hours of such arrest excluding the time necessary for the journey from the place of arrest to the court of the magistrate and no such person shall be detained in custody beyond the said period without the authority of a magistrate.

(3) Nothing in clauses (1) and (2) shall apply —

(a) to any person who for the time being is an enemy alien; or

(b) to any person who is arrested or detained under any law providing for preventive detention.

(4) No law providing for preventive detention shall authorise the detention of a person for a longer period than three months