Most policies will require you notify them within 30 days, this generally doesn't mean free coverage as they will date the change of your policy to the purchase date.
You can't legally drive a car in Indiana without auto insurance for any length of time. If by chance you mean how long can you drive a newly purchased vehicle before needing to notify the insurance company that was covering your old vehicle you'll need to read your policy. Policies will vary by company but many companies will give you up to 30 days to notify them of the change in vehicles.
Most people would call their agent as soon as possible. Some people would call from the car lot when they buy it. You aren't insured until you notify them.
There is no legal time requirement, but if you want to receive your policy renewal it would be smart to let them know.
He needs to notify you 60 days in advance, per ERISA. He has the option of notifying you via quarterly newsletter, so long as the newsletter announcing the rate change is sent before the change happens.
In the United States, If the vehicle is a replacement (trade-in) for the vehicle currently on your policy then it will generally be covered under the replacement rule so long as you follow the terms of your policy and notify the insurer within required number of days. If it is an additional acquired vehicle then generally it is not covered until you notify your insurer to add it to your policy.
10 days
If you already have insurance and trade in your car you have 10 days to notify your insurance company or your new car will not be covered.
If you want to stop paying taxes on that vehicle I would notify them very quickly. It is to your benefit.
When you move, you typically have 10 days to notify the DMV of your change of address. This applies to updating your driver's license, vehicle registration, and other related documents. It's important to check your specific state's regulations, as requirements can vary. Failing to notify the DMV in a timely manner may result in fines or complications with your vehicle registration.
Assuming you stay with the same insurance company, the existing policy will remain in effect. However, you must notify the company of the change in vehicle make, model, year. If there is a difference in premium, your policy amount may be prorated for the month in which you purchased the car, then the new policy amount is required.
You don't notify the Secretary of State of an address change. Contact your DMV and the post office.
15 days