6. Recruitment.

(a) in the case of the post of Assistant Engineer or equivalent rank-
(i) by direct recruitment;
(ii) by promotion from amongst Junior Engineers;
(b) in the case of the post of Executive Engineer and equivalent rank, by promotion from amongst the Assistant Engineers/Sub-Divisional Officers of the Board, possessing the minimum qualifications laid down for Junior Engineers ;
(c) in the case of the post of Superintending Engineer and equivalent rank, by promotion from amongst the Executive Engineers of the Board, possessing the minimum qualifications laid down for direct recruits to the service vide Regulation 8(a) below;
(d) in the case of the post of Additional Chief Engineer and Chief Engineer, by promotion respectively from amongst the Superintending Engineer and Additional Chief Engineers of the Board.