The commissioner may adopt rules, under RSA 541-A, which are reasonable and necessary for the implementation and administration of this chapter relative to: I. Financial solvency standards, for investments under RSA 402:28. II. Valuation standards, for investments under RSA 402:28. III. Reporting requirements, for investments under RSA 402:28. IV. Valuation of eligible investments not covered under RSA 402:30. V. [Repealed.]