(a) The leave travel concession to hometown shall be admissible irrespective of the distance between the headquarters of the Government servant and his hometown, once in a block of two calendar years. (b) The leave travel concession to any place in India shall be admissible irrespective of the distance of the place of visit from the headquarters of the Government servant, once in a block of four calendar years. Provided that in the case of a Government servant to whom leave travel concession to hometown is admissible, the leave travel concession to any place in India availed of by him shall be in lieu of, and adjusted against, the leave travel concession to hometown available to him at the time of commencement of the journey;