15 C.F.R. § 240.4
(c) The term tag is defined as a tough and strong strip of cloth or paper or the like, bearing any printed, pictorial, or other matter, which is loose at one end and which is secured to a container of lime subject to the provisions of the act.
(Sec. 3, 39 Stat. 530; 15 U.S.C. 239)