31. There is no nationally set law enforcement rank structure , but they tend to follow similar patterns. 32. The rank structure for Specials adopts the NPIA recommendations to use standard insignias and not'bars '. 33. Hawsepiper refers to climbing up the hawsepipe, a nautical metaphor for climbing up the ship's rank structure . 34. The rank structure of the Cadet Corps is generally based on the Army ROTC cadet rank structure. 35. The rank of chief warrant officer was introduced into the warrant officers rank structure in July 2012. 36. The rank structure of the Cadet Corps is generally based on the Army ROTC cadet rank structure . 37. The Provincial Marine followed the practices and rank structure of the Royal Navy, but with some flexibility. 38. The rank structure of the Indian Air Force is based on that of the Royal Air Force. 39. In recent years, the rank of Deputy Chief and Director has been added to the rank structure . 40. This runs throughout the entire rank structure .
