Section 66. Payment of Balance of Subscription.— Subject to the provisions of the subscription contract, the board of directors may, at any time, declare due and payable to the corporation unpaid subscriptions and may collect the same or such percentage thereof, in either case, with accrued interest, if any, as it may deem necessary.

Payment of unpaid subscription or any percentage thereof, together with any interest accrued, shall be made on the date specified in the subscription contract or on the date stated in the call made by the board. Failure to pay on such date shall render the entire balance due and payable and shall make the stockholder liable for interest at the legal rate on such balance, unless a different interest rate is provided in the subscription contract. The interest shall be computed from the date specified, until full payment of the subscription. If no payment is made within thirty (30) days from the said date, all stocks covered by the subscription shall thereupon becoihe delinquent and shall be subject to sale as hereinafter provided, unless the board of directors orders otherwise.