Mace and tasers are not considered dangerous ordnance. Short knives/ pocket knives can be carried concealed as "tools". Legal length varies by different municipalities, it is in the grey area. I would say just keep the blade length below 2.5 inches should have you covered in most cities. Less you tell the cop the better, if you have a tool, you are not obligated to tell a cop that you have it. If you do have giant bowie knife under the seat and it is illegal to conceal in that city, you just got your self in trouble. You are protected by the 4th and 5th amendment, use it. From what I gather, promptly notification only applies to if you are carrying a loaded handgun.