N.Y. Comp. Codes R. & Regs. tit. 10 § 441.183
The control of merchandise, materials, goods in process, finished goods, and supplies on hand by accounting and physical methods. An accounting control is effected by means of a stock or stores ledger, mechanical storage records, or a ledger account in which the quantities or amounts (or both) of goods received during an accounting period are added to corresponding balances at the beginning of the period and amounts of goods sold or otherwise disposed of are deducted at a calculated cost based on individual identification or any of various methods of averaging. Physical controls consist of various plans of buying, storing, handling, issuing, supervising and stock-taking. Stock-ledger control is made more effective by physical control in the nature of continuous check of the goods on hand.
N.Y. Comp. Codes R. & Regs. Tit. 10 § 441.183