Whenever the size of the Fund decreases to less than $2 million, the Director shall suspend the return of payments pursuant to § 45.2-1237 and shall assess all members an equal amount for each affected acre, for a total amount sufficient to raise the Fund to $2 million. In lieu of such assessment, all members shall at the request of the Director post bonds or other securities within six months after the Director so notifies the members. Failure of a member to post bond or other surety or to pay the required assessment shall result in the revocation of the permit of the member and the forfeiture of the member’s payments in accordance with § 45.2-1238.