Each railroad company may borrow money and give its bonds therefor, signed by its president and countersigned by its treasurer, and may dispose thereof as authorized by its stockholders. Any bonds issued by virtue of the general authority conferred by this section shall, before being issued, be registered in the office of the Comptroller, and a certificate of such registration shall appear on each bond so issued. The Comptroller shall cancel any bonds so registered which are brought to him for cancellation and enter a memorandum of such cancellation in his register. No such company, by virtue of the general authority conferred by this section, shall issue any bonds of a lesser denomination than one hundred dollars or have bonds, issued under such authority and without other authority from the General Assembly, outstanding at any one time to a greater amount than one-half the sum which its president, treasurer and an engineer approved by the Public Utilities Regulatory Authority certify under oath has been actually expended upon its railroad, and any false swearing in the matter shall be deemed false statement under § 53a-157b. The Comptroller shall not permit the bonds of any railroad company, issued under authority of this section, registered in his office and uncancelled, to exceed the amount limited in this section.