Must a new motor vehicle be registered in New York State prior to starting its depreciation? The collateral in questions is an over the road trailer that is used in a seasonal business. Thanks

Yes; definitely.You can continue to claim a deduction for depreciation on tangible personal property used in your business or for the production of income even if it is temporarily idle. For example, if you stop using a machine because there is a temporary lack of a market for a product made with that machine, continue to deduct depreciation on the machine. Please visit the IRS Website here for further info.;
Publication 225 (2010), Farmer's Tax Guide