Md. Code, Insurance § 10–6A–05

(a) Except as provided in subsection (b) of this section, an insurance policy sold in connection with, and incidental to, a peer–to–peer car sharing program agreement under the provisions of this subtitle is primary to any other valid and collectible coverage.

(b) Any insurance sold to a shared vehicle driver under the provisions of this subtitle is not primary to the coverage provided by the peer–to–peer car sharing program under § 19–520(d)(1) of this article.