Section 39
SEC. 39. The commanding officer of each regiment, battalion, company, battery, engineer company, signal corps, detachment or section of any detachment, may order weekly or semiweekly drills. The minimum number of such drills so ordered shall be forty-eight in any one year, and such ' commanding officer may order such parades, maneuvers and exercises in addition to the regular drills as the proper instruction of his command and the proper observance of legal holidays may make necessary.