“11. There is yet another aspect. of the question. Where advertisement is issued inviting applications for direct recruitment to a category of posts, and the advertisement expressly states that selection shall be made in accordance with the existing Rules or Government Orders, and if it further indicates the extent of reservations in favour of 'Various categories, the selection of candidates in such a case must be made in accordance with the then existing Rules and Government Orders. Candidates who apply, and undergo written or viva voce test acquire vested right for being considered for selection in accordance with the terms and conditions contained in the advertisement, unless the advertisement itself indicates a contrary intention. Generally, a candidate has right to be considered in accordance with the terms and conditions set out in the advertisement as his right crystallises on the date of publication of advertisement, however he has no absolute right in the matter. If the recruitment Rules are amended retrospectively during the pendency of selection, in that event selection must be held in accordance with the amended Rules. Whether the Rules have retrospective effect or not, primarily depends upon the language of the Rules and its construction to ascertain the legislative intent. The legislative intent is ascertained either by express provision or by necessary implication, if the amended Rules are not retrospective in nature the selection must be regulated in accordance with the Rules and orders which were in force on the date of advertisement. Determination of this question largely depends on the facts of each case having regard to the terms and conditions set out in the advertisement and the relevant Rules and orders. Lest there be any confusion, we would
