After January 1, 1989, home health agencies shall employ only home health aides qualified to provide home health care pursuant to sections 71-6601 to 71-6615. The department shall prescribe procedures for verification by home health agencies of successful completion of the requirements of section 71-6603. Home health agencies shall provide direction and supervision of home health aides. Home health agencies shall provide or make available to their home health aides four one-hour inservice programs per year on subjects relevant to home health care and shall verify such programs in a manner and method prescribed by the department.