Every officer, employee, and agent handling or having custody or charge of funds or securities belonging to a savings and loan association, before entering upon the discharge of his duties, shall give a good and sufficient bond in such sum as may be fixed by the board of directors of any such association. Such bond shall be in such form and provide such coverage as the commissioner may direct and shall be made by a surety corporation authorized to do business in this state. The amount of such bond as to each person shall be subject to the approval of the commissioner. In lieu of individual bonds, a blanket bond covering all active officers, agents, and employees of such association may be executed, subject to approval by the commissioner. Every such bond shall be in force until ten days after notice to such commissioner that the same is to be cancelled.