(a)Notwithstanding anything contained in sub-paragraphs (1) to (3) or in the [Indian Passport Act, 1920 (34 of 1920)] [See the Passport (Entry into India) Act, 1920 (34 of 1920.)], or in the rules made thereunder, a civil authority may, in the interests of public safety, prohibit the entry of any foreigner into India.