(a) When the certificate of incorporation has been issued, the persons named therein, in case they have not subscribed to the entire capital stock, may open books of subscription to complete the subscription to the capital stock of the company, in such places and after giving such notice as they may deem expedient, and may from time to time receive subscriptions until all of the capital stock is subscribed to.(b) The capital stock of the company shall be divided into shares of $100.00 each.(c) The company shall not begin the construction of the railroad until all of the capital stock specified in the petition for incorporation has been subscribed to.