Insurance is a subject mater of solicitation

All insurance ads have this line "Insurance is a subject mater of solicitation". What do they mean?

www.physicsforums.com/showthread.php?t=176551

Is Universal Health Insurance Affordable?

Judging from the commentaries, this blogger gets the very distinct impression that campaigns for the US presidential elections next year and the Democratic Party's candidate will need to say a lot of really sensible things about the ...

bookishposts.blogspot.com/2007/06/is-universal-health-insurance.html