Section 2504 - Rate filings(a) Every insurer shall file with the Commissioner, except as to inland marine risks which by general custom of the business are not written according to manual rates or rating plans, every manual, minimum, class rate, rating schedule or rating plan and every other rating rule, and every modification of any of the foregoing which it proposes to use. Every such filing shall state the proposed effective date thereof, and shall indicate the character and extent of the coverage contemplated.(b) When a filing is not accompanied by the information upon which the insurer supports such filing, and the Commissioner does not have sufficient information to determine whether such filing meets the requirements of this chapter he/she shall require the insurer to furnish the information upon which it supports the filing. The information furnished in support of a filing may include (1) the experience or judgment of the insurer or rating organization making the filing; (2) its interpretation of any statistical data it relies upon; and (3) the experience of other insurers or rating organizations in conjunction with (1); or (4) any other relevant factors. A filing and supporting information shall be open to inspection by parties in interest after the filing becomes effective.(c) Specific inland marine rates on risks specially rated, made by a rating organization, shall be filed with the Commissioner and shall become effective when filed and shall be deemed approved and in compliance with the requirements of this chapter until such time as the Commissioner rejects the filing.18 Del. C. 1953, § 2504; 56 Del. Laws, c. 380, § 1; 70 Del. Laws, c. 186, § 1.;