Va. Code Ann. § 38.2-1380
A. An insurer shall establish reserves using a principle-based valuation that meets the following conditions for policies or contracts as specified in the valuation manual:
3. Incorporate assumptions that are derived in one of the following manners:
b. For assumptions that are not prescribed, the assumptions shall:
B. An insurer using a principle-based valuation for one or more policies or contracts subject to this section as specified in the valuation manual shall:
2014, c. 571.