Nothing in section 189.11 shall be construed as requiring the printing of a patented or proprietary trade formula on a label.

[S13, §5077-a7; SS15, §4999-a31c; C24, 27, 31, 35, 39, §3040; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §189.12]

Referred to in §191.1, §191.2, §196.10, §210.18