Contracts or agreements.

All contracts or agreements made in violation of any of the provisions of sections 551.1 and 551.2 shall be void. [S13, §5028-d; C24, 27, 31, 35, 39, § 9889; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §551.5 ] Referred to in §551.6