Their inter se seniority shall be determined in accordance with the order of merit in such list; (ii) the seniority of a permanent servant appointed to officiate in another service or post by transfer shall be determined adhoc by the appointing authority; Provided that the seniority proposed to be assigned to such Government servant shall be determined and intimated to him in the order of appointment; C (iii) where a permanent Government servant is reduced to a lower service, grade or category of posts, he shall rank in the gradation list of the latter service, grade or category of posts above all the other in that gradation list unless the authority ordering such reduction by a special order indicates a different position in the gradation list for such reduced Government servant, (iv) where an officiating Government servant is reverted to this substantive service or posts he shall revert to his position in that gradation list relating to his substantive appointment which he held before he was appointed to officiate in the other service or post." In the proper perspective these two rules do not apply in this matter.