2207.7 (B) Works Consisting of Sheet-Like or Strip Material
Where a work is reproduced in copies consisting of sheet-like or strip material bearing multiple or continuous reproductions of the work, the notice may be applied to:
• The reproduction itself; or
• The margin, selvage, or reverse side of the material at frequent and regular intervals; or
• If the material contains neither a selvage nor a reverse side, to tags or labels attached to the copies and to any spools, reels, or containers housing them in such a way that a notice is visible while the copies are passing through their normal channels of commerce.
37 C.F.R. § 202.2 (C) (9)(iv).