Ark. Code Ann. § 26-26-1205: Manufacturers

(a) Every person who shall purchase, receive, or hold personal property of any description for the purpose of adding to the value thereof by process of manufacturing, refining, rectifying, or by combination of different materials, with a view of making a gain or profit by so doing, shall be held to be a manufacturer. He or she shall make out and deliver to the county assessor a sworn statement of the amount of his or her other personal property subject to taxation, also including in his or her statement the average value, estimated as provided in § 26-26-1203 , of all articles purchased, received, or otherwise held for the purpose of being used, in whole or in part, in any process or operation of manufacturing, combining, rectifying, or refining which from time to time he or she shall have on hand during the year next previous to the time of making the statement, if so long he or she shall have been engaged in such manufacturing business, and, if not, then during the time he or she shall have been so engaged.

(b) Every person owning a manufacturing establishment of any kind and every manufacturer shall list as a part of his or her manufacturer's stock the value of all engines and machinery of every description, used or designed to be used for the indicated purpose.