Notwithstanding anything contained elsewhere in these Rules, it may be refused to issue a visa to any of the following foreigners or the Immigration Officer may, at the entry point, refuse to permit them to enter into Nepal:
(a) Whose passport and visa seem to be doubtful;
(b) Who have been deported from or who have been prohibited from entering into Nepal for having committed any act contrary to the Act or these Rules;
(c) Who have already spent the period allowed for their stay pursuant to these Rules;
(d) Whose travel documents seem to be doubtful of those foreigners who intend to enter into Nepal.