Handbook - Radio Codes

I have highlighted the codes that you MUST know to become a Police Officer I
10-1 - Negative
10-2 - Affirmative
10-3 - Repeat last message
10-4 - Message Received
10-5 - ((Logging Off))
10-6 - Off Duty
10-7 - On Duty ((Standard Patrol))
10-8 - On Duty ((Division))
10-9 - On Duty ((Dispatch))
10-10 - Description
10-11 - Inactive ((Pay And Spray, ETC.))
10-12 - Requesting Backup
10-13 - BOLO ((Vehicle/Person)) ((Description | Vehicle Model, Color, ETC | Clothing, Accessories, ETC)) ((Last Seen))
10-14 - Permission for Department Radio
10-15 - Suspect in Costody
10-16 - Requesting Patrol Parter
10-17 - Stand-By
10-18 - Return to Station
10-19 - Return to Station for Reassignment ((Used by Sergeant II+))
10-20 - Location
10-21 - Meet at ((Location))
10-22 - Disregard Last Message
10-24 - Respond Silent ((Lights + Siren are Off))
10-25 - Traffic Stop on Suspicious Vehicle
10-26 - Traffic Stop
10-27 - Felony Traffic Stop
10-28 - Silence Radio ((You are not to use '/r'))
10-30 - Activity Update ((10-26, 10-7, 10-8, ETC)) - ((Used by Dispatch or Sergeant II+))
10-33 - No Need For Further Assistance
10-53 - Traffic Jam/Barricade
10-54 - Traffic Accident
10-57 - Hit and Run
10-60 - Suspicious Person or Vehicle
10-66 - Attempting to P.I.T the Suspect
10-76 - En-Route ((Location))
10-77 - ETA ((Estimated Time Arrival))
10-80 - Presuit in Progress ((Directions [Northbound, Eastbound, ETC.])) ((Vehicle Description)) ((Occupants)) ((Remarks))
10-84 - Requesting an Ambulance
10-85 - Requesting a Tow Truck
10-86 - Requesting FBI ((This Code is Used While Talking to Dispatch))
10-90 - Requesting a APB ((All Points Bulletin)) ((This Code is Used While Talking to Dispatch))
10-91 - APB ((Description)) ((Location if Available)) ((Head Dispatch or Lieutenant III+))
10-95 - Officer Down
10-96 - Requesting SWAT
10-98 - Priority Backup ((Shots Fired, Civilians Life in Trouble, ETC))
10-99 - Officer in Extreme Danger ((Stop What Ever You're Doing, and Respond to The Call))