Virginia Register of Regulations, November 8, 2010, Page 536:

‘prolonged mold presence could cause structural damage’ – fails to recognize the fact that most situations involve mold growth on building materials subsequent to prolonged water damage, and that the predominant molds are fungi that use cellulose as their main source of nutrition. Structural damage is commonly related to prolonged water damage (e.g., dissolution of gypsum board) and to wood rot fungi, not the sapstain or phylloplane fungi (molds).