1. Every group, association or other organization of insurers which engages in joint underwriting or joint reinsurance shall be subject to regulation with respect thereto as herein provided, subject, however, with respect to joint underwriting, to all other provisions of section 379.017 and sections 379.316 to 379.361 and, with respect to joint reinsurance, to section 379.343.

2. If, after a hearing, the director finds that any activity or practice of any such group, association or other organization is unfair or unreasonable or otherwise inconsistent with the provisions of section 379.017 and sections 379.316 to 379.361, he may issue a written order specifying in what respects such activity or practice is unfair or unreasonable or otherwise inconsistent with the provisions of section 379.017 and sections 379.316 to 379.361, and requiring the discontinuance of such activity or practice.