Maryland Code, Insurance § 11-323

(a) On or before July 1 of each year, each insurer and the Maryland Automobile Insurance Fund shall file data about the geographic distribution of private passenger premium written by it in the State for the preceding calendar year.

(b) The data required under this section shall:

(c) The data shall be submitted by each rating territory or each zip code, or both.

(d) Failure by the insurer or the Maryland Automobile Insurance Fund to submit the data required under this section on a timely basis is grounds for the imposition of the penalties provided in §§ 4-113 and 4-114 of this article.