S.D. Const. art. IV, § 8

All executive and administrative offices, boards, agencies, commissions and instrumentalities of the state government and their respective functions, powers and duties, except for the office of Governor, lieutenant governor, attorney general, secretary of state, auditor, treasurer, and commissioner of school and public lands, shall be allocated by law among and within not more than twenty-five principal departments, organized as far as practicable according to major purposes, by no later than July 1, 1974. Subsequently, all new powers or functions shall be assigned to administrative offices, agencies and instrumentalities in such manner as will tend to provide an orderly arrangement in the administrative organization of state government. Temporary commissions may be established by law and need not be allocated within a principal department.

Except as to elected constitutional officers, the Governor may make such changes in the organization of offices, boards, commissions, agencies and instrumentalities, and in allocation of their functions, powers and duties, as he considers necessary for efficient administration. If such changes affect existing law, they shall be set forth in executive orders, which shall be submitted to the Legislature within five legislative days after it convenes, and shall become effective, and shall have the force of law, within ninety days after submission, unless disapproved by a resolution concurred in by a majority of all the members of either house.