Colorado constitution
Article XV
Section 9

No corporation shall issue stocks or bonds, except for labor done, service performed, or money or property actually received, and all fictitious increase of stock or indebtedness shall be void. The stock of corporations shall not be increased except in pursuance of general law, nor without the consent of the persons holding a majority of the stock, first obtained at a meeting held after at least thirty days' notice given in pursuance of law.